./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/array-memsafety/openbsd_cstpcpy-alloca-1.i -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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:46:50,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:46:50,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:46:50,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:46:50,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:46:50,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:46:50,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:46:50,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:46:50,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:46:50,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:46:50,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:46:50,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:46:50,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:46:50,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:46:50,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:46:50,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:46:50,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:46:50,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:46:50,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:46:50,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:46:50,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:46:50,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:46:50,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:46:50,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:46:50,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:46:50,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:46:50,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:46:50,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:46:50,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:46:50,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:46:50,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:46:50,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:46:50,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:46:50,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:46:50,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:46:50,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:46:50,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:46:50,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:46:50,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:46:50,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:46:50,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:46:50,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:46:50,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:46:50,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:46:50,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:46:50,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:46:50,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:46:50,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:46:50,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:46:50,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:46:50,952 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:46:50,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:46:50,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:46:50,953 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:46:50,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:46:50,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:46:50,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:46:50,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:46:50,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:46:50,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:46:50,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:46:50,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:46:50,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:46:50,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:46:50,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:46:50,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:46:50,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:46:50,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2021-12-16 05:46:51,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:46:51,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:46:51,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:46:51,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:46:51,200 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:46:51,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-16 05:46:51,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00ebd4e6/d54a85a6b5bb4d17ba27477344d2fa21/FLAG257249228 [2021-12-16 05:46:51,587 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:46:51,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-16 05:46:51,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00ebd4e6/d54a85a6b5bb4d17ba27477344d2fa21/FLAG257249228 [2021-12-16 05:46:52,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00ebd4e6/d54a85a6b5bb4d17ba27477344d2fa21 [2021-12-16 05:46:52,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:46:52,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:46:52,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:46:52,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:46:52,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:46:52,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fea540d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52, skipping insertion in model container [2021-12-16 05:46:52,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:46:52,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:46:52,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:46:52,347 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:46:52,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:46:52,395 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:46:52,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52 WrapperNode [2021-12-16 05:46:52,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:46:52,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:46:52,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:46:52,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:46:52,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,433 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-16 05:46:52,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:46:52,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:46:52,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:46:52,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:46:52,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:46:52,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:46:52,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:46:52,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:46:52,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (1/1) ... [2021-12-16 05:46:52,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:46:52,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:52,499 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) [2021-12-16 05:46:52,503 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 [2021-12-16 05:46:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:46:52,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:46:52,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:46:52,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:46:52,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:46:52,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:46:52,633 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:46:52,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:46:52,748 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:46:52,752 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:46:52,752 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 05:46:52,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:46:52 BoogieIcfgContainer [2021-12-16 05:46:52,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:46:52,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:46:52,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:46:52,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:46:52,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:46:52" (1/3) ... [2021-12-16 05:46:52,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2d8c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:46:52, skipping insertion in model container [2021-12-16 05:46:52,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:46:52" (2/3) ... [2021-12-16 05:46:52,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2d8c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:46:52, skipping insertion in model container [2021-12-16 05:46:52,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:46:52" (3/3) ... [2021-12-16 05:46:52,771 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2021-12-16 05:46:52,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:46:52,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-16 05:46:52,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:46:52,830 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 [2021-12-16 05:46:52,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-16 05:46:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) [2021-12-16 05:46:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:46:52,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:52,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:46:52,844 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-16 05:46:52,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:52,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060682505] [2021-12-16 05:46:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:52,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:52,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060682505] [2021-12-16 05:46:52,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060682505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:52,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:52,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:46:53,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451152479] [2021-12-16 05:46:53,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:53,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:46:53,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:46:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:53,027 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) Second operand has 4 states, 4 states have (on average 1.5) 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) [2021-12-16 05:46:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:53,076 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-16 05:46:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:46:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2021-12-16 05:46:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:53,083 INFO L225 Difference]: With dead ends: 34 [2021-12-16 05:46:53,084 INFO L226 Difference]: Without dead ends: 30 [2021-12-16 05:46:53,086 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 [2021-12-16 05:46:53,089 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:53,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-16 05:46:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-16 05:46:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-16 05:46:53,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-16 05:46:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:53,115 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-16 05:46:53,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2021-12-16 05:46:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-16 05:46:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:46:53,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:53,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:46:53,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:46:53,117 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-16 05:46:53,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938612816] [2021-12-16 05:46:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:53,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938612816] [2021-12-16 05:46:53,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938612816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:53,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:53,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:46:53,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923428187] [2021-12-16 05:46:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:53,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:46:53,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:46:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:46:53,160 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2021-12-16 05:46:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:53,179 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-16 05:46:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:46:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2021-12-16 05:46:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:53,182 INFO L225 Difference]: With dead ends: 29 [2021-12-16 05:46:53,182 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 05:46:53,183 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 [2021-12-16 05:46:53,187 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:53,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 05:46:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-16 05:46:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-16 05:46:53,192 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-16 05:46:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-16 05:46:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2021-12-16 05:46:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-16 05:46:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:46:53,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:53,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:53,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:46:53,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-16 05:46:53,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:53,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826853222] [2021-12-16 05:46:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:53,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:53,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826853222] [2021-12-16 05:46:53,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826853222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:53,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:53,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:46:53,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994791649] [2021-12-16 05:46:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:46:53,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:46:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:53,280 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2021-12-16 05:46:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:53,309 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-16 05:46:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:46:53,310 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 [2021-12-16 05:46:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:53,311 INFO L225 Difference]: With dead ends: 33 [2021-12-16 05:46:53,311 INFO L226 Difference]: Without dead ends: 33 [2021-12-16 05:46:53,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:53,313 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:53,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-16 05:46:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-12-16 05:46:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-16 05:46:53,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2021-12-16 05:46:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:53,320 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-16 05:46:53,320 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) [2021-12-16 05:46:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-16 05:46:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:46:53,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:53,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:53,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:46:53,322 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2021-12-16 05:46:53,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:53,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455317114] [2021-12-16 05:46:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:53,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:53,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455317114] [2021-12-16 05:46:53,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455317114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:53,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:53,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:46:53,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486805544] [2021-12-16 05:46:53,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:53,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:46:53,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:53,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:46:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:46:53,396 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-12-16 05:46:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:53,447 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-16 05:46:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:46:53,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 [2021-12-16 05:46:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:53,448 INFO L225 Difference]: With dead ends: 48 [2021-12-16 05:46:53,449 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 05:46:53,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:46:53,455 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:53,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 41 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 05:46:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2021-12-16 05:46:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-16 05:46:53,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-16 05:46:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:53,465 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-16 05:46:53,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-12-16 05:46:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-16 05:46:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:46:53,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:53,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:53,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:46:53,466 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-16 05:46:53,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:53,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494101478] [2021-12-16 05:46:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:53,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494101478] [2021-12-16 05:46:53,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494101478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:53,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:53,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:46:53,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685284848] [2021-12-16 05:46:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:53,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:46:53,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:46:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:53,511 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2021-12-16 05:46:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:53,539 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-16 05:46:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:46:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2021-12-16 05:46:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:53,540 INFO L225 Difference]: With dead ends: 29 [2021-12-16 05:46:53,540 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 05:46:53,541 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 [2021-12-16 05:46:53,541 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:53,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 05:46:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-16 05:46:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-16 05:46:53,544 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2021-12-16 05:46:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:53,544 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-16 05:46:53,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2021-12-16 05:46:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-16 05:46:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:46:53,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:53,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:53,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:46:53,545 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1762264955, now seen corresponding path program 1 times [2021-12-16 05:46:53,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:53,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747466265] [2021-12-16 05:46:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:53,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747466265] [2021-12-16 05:46:53,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747466265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064900947] [2021-12-16 05:46:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:53,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:53,632 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) [2021-12-16 05:46:53,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:46:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:46:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:53,820 INFO L388 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 22 treesize of output 18 [2021-12-16 05:46:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:53,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064900947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:53,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:53,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-16 05:46:53,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891090388] [2021-12-16 05:46:53,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:53,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:46:53,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:46:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:46:53,878 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2021-12-16 05:46:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:53,961 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-16 05:46:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:46:53,962 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 [2021-12-16 05:46:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:53,962 INFO L225 Difference]: With dead ends: 48 [2021-12-16 05:46:53,963 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 05:46:53,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:46:53,963 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:53,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 81 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 05:46:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-12-16 05:46:53,965 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) [2021-12-16 05:46:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-16 05:46:53,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-12-16 05:46:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:53,966 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-16 05:46:53,966 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) [2021-12-16 05:46:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-16 05:46:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:46:53,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:53,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:54,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:54,183 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 [2021-12-16 05:46:54,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash 952918329, now seen corresponding path program 1 times [2021-12-16 05:46:54,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:54,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834053397] [2021-12-16 05:46:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:54,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:54,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834053397] [2021-12-16 05:46:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834053397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:54,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673089139] [2021-12-16 05:46:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:54,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:54,253 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) [2021-12-16 05:46:54,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:46:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:54,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:46:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:54,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:54,440 INFO L388 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 22 treesize of output 18 [2021-12-16 05:46:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:54,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673089139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:54,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:54,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-16 05:46:54,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121643554] [2021-12-16 05:46:54,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:54,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:46:54,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:46:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:46:54,506 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2021-12-16 05:46:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:54,658 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-12-16 05:46:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:46:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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 11 [2021-12-16 05:46:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:54,659 INFO L225 Difference]: With dead ends: 76 [2021-12-16 05:46:54,659 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 05:46:54,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:46:54,660 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:54,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 106 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:46:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 05:46:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 35. [2021-12-16 05:46:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-16 05:46:54,663 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 11 [2021-12-16 05:46:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:54,663 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-16 05:46:54,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2021-12-16 05:46:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-16 05:46:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:46:54,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:54,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:54,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:54,880 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 [2021-12-16 05:46:54,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:54,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976699, now seen corresponding path program 1 times [2021-12-16 05:46:54,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:54,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467036769] [2021-12-16 05:46:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:54,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:54,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467036769] [2021-12-16 05:46:54,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467036769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:54,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:54,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:46:54,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880162075] [2021-12-16 05:46:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:54,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:46:54,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:46:54,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:46:54,936 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:54,971 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-12-16 05:46:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:46:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:46:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:54,971 INFO L225 Difference]: With dead ends: 34 [2021-12-16 05:46:54,972 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 05:46:54,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:46:54,972 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:54,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 05:46:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-16 05:46:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 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) [2021-12-16 05:46:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-16 05:46:54,974 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-12-16 05:46:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:54,974 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-16 05:46:54,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-16 05:46:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:46:54,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:54,975 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:54,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 05:46:54,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-16 05:46:54,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:54,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822535226] [2021-12-16 05:46:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:54,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822535226] [2021-12-16 05:46:55,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822535226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511395225] [2021-12-16 05:46:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:55,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:55,040 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) [2021-12-16 05:46:55,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:46:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:55,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:46:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:55,142 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:46:55,142 INFO L388 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 [2021-12-16 05:46:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511395225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:55,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:55,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-16 05:46:55,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878688273] [2021-12-16 05:46:55,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:55,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:46:55,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:46:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:46:55,289 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:55,333 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-16 05:46:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:46:55,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:46:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:55,333 INFO L225 Difference]: With dead ends: 37 [2021-12-16 05:46:55,333 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 05:46:55,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:46:55,334 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:55,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 05:46:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-16 05:46:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-16 05:46:55,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-12-16 05:46:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-16 05:46:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-16 05:46:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:46:55,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:55,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:55,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:55,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:55,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506494, now seen corresponding path program 1 times [2021-12-16 05:46:55,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:55,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774541241] [2021-12-16 05:46:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:55,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774541241] [2021-12-16 05:46:55,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774541241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:55,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:55,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:46:55,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664122113] [2021-12-16 05:46:55,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:55,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:46:55,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:46:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:55,556 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:55,571 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-16 05:46:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:46:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-16 05:46:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:55,572 INFO L225 Difference]: With dead ends: 23 [2021-12-16 05:46:55,572 INFO L226 Difference]: Without dead ends: 23 [2021-12-16 05:46:55,572 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 [2021-12-16 05:46:55,573 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:55,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-16 05:46:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-16 05:46:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 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) [2021-12-16 05:46:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-16 05:46:55,574 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2021-12-16 05:46:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:55,575 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-16 05:46:55,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-16 05:46:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:46:55,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:55,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:55,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 05:46:55,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506495, now seen corresponding path program 1 times [2021-12-16 05:46:55,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:55,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403722639] [2021-12-16 05:46:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:55,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403722639] [2021-12-16 05:46:55,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403722639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747204647] [2021-12-16 05:46:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:55,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:55,640 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) [2021-12-16 05:46:55,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:46:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 05:46:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:55,762 INFO L388 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 20 treesize of output 16 [2021-12-16 05:46:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:55,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747204647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:55,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:55,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-16 05:46:55,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36214908] [2021-12-16 05:46:55,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:55,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:46:55,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:46:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:46:55,779 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:55,851 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-16 05:46:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:46:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 13 [2021-12-16 05:46:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:55,852 INFO L225 Difference]: With dead ends: 36 [2021-12-16 05:46:55,852 INFO L226 Difference]: Without dead ends: 36 [2021-12-16 05:46:55,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:46:55,853 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:55,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 56 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-16 05:46:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-12-16 05:46:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-16 05:46:55,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2021-12-16 05:46:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:55,855 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-16 05:46:55,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-16 05:46:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 05:46:55,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:55,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:55,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 05:46:56,068 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 [2021-12-16 05:46:56,069 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971629, now seen corresponding path program 1 times [2021-12-16 05:46:56,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068610178] [2021-12-16 05:46:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:56,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:46:56,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068610178] [2021-12-16 05:46:56,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068610178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:56,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:56,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:46:56,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128168343] [2021-12-16 05:46:56,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:56,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:46:56,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:56,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:46:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:46:56,166 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:56,253 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-16 05:46:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:46:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 05:46:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:56,254 INFO L225 Difference]: With dead ends: 42 [2021-12-16 05:46:56,254 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 05:46:56,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:46:56,254 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:56,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 44 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 05:46:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2021-12-16 05:46:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 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) [2021-12-16 05:46:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-16 05:46:56,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-16 05:46:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-16 05:46:56,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-16 05:46:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 05:46:56,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:56,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:56,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 05:46:56,257 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971628, now seen corresponding path program 1 times [2021-12-16 05:46:56,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:56,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553264196] [2021-12-16 05:46:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:56,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:46:56,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:56,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553264196] [2021-12-16 05:46:56,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553264196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:56,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:56,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:46:56,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145707565] [2021-12-16 05:46:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:56,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:46:56,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:46:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:46:56,322 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:56,349 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-16 05:46:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:46:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 05:46:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:56,350 INFO L225 Difference]: With dead ends: 30 [2021-12-16 05:46:56,350 INFO L226 Difference]: Without dead ends: 30 [2021-12-16 05:46:56,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:46:56,350 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:56,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-16 05:46:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-16 05:46:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-16 05:46:56,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-16 05:46:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:56,352 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-16 05:46:56,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-16 05:46:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:46:56,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:56,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:56,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 05:46:56,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1933649190, now seen corresponding path program 1 times [2021-12-16 05:46:56,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:56,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220949577] [2021-12-16 05:46:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:56,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:56,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220949577] [2021-12-16 05:46:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220949577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495094736] [2021-12-16 05:46:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:56,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:56,473 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) [2021-12-16 05:46:56,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:46:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 05:46:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:56,598 INFO L388 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 14 treesize of output 10 [2021-12-16 05:46:56,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:46:56,681 INFO L388 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 18 treesize of output 18 [2021-12-16 05:46:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:56,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:56,890 INFO L388 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 13 treesize of output 11 [2021-12-16 05:46:56,906 INFO L388 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 20 treesize of output 18 [2021-12-16 05:46:57,027 INFO L388 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 47 treesize of output 39 [2021-12-16 05:46:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:57,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495094736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:57,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:57,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2021-12-16 05:46:57,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824904661] [2021-12-16 05:46:57,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:57,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:46:57,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:46:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:46:57,103 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:57,495 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-16 05:46:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:46:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-12-16 05:46:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:57,496 INFO L225 Difference]: With dead ends: 39 [2021-12-16 05:46:57,496 INFO L226 Difference]: Without dead ends: 39 [2021-12-16 05:46:57,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:46:57,496 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:57,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 171 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-12-16 05:46:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-16 05:46:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-16 05:46:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-16 05:46:57,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2021-12-16 05:46:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:57,498 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-16 05:46:57,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-16 05:46:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:46:57,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:57,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:57,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:57,699 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,SelfDestructingSolverStorable13 [2021-12-16 05:46:57,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1350200856, now seen corresponding path program 1 times [2021-12-16 05:46:57,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:57,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769182241] [2021-12-16 05:46:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:57,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:57,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769182241] [2021-12-16 05:46:57,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769182241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538870482] [2021-12-16 05:46:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:57,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:57,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:57,827 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) [2021-12-16 05:46:57,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:46:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 05:46:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:57,909 INFO L388 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 14 treesize of output 10 [2021-12-16 05:46:57,940 INFO L388 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 15 treesize of output 7 [2021-12-16 05:46:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:46:57,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:46:57,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538870482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:57,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:46:57,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 11 [2021-12-16 05:46:57,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990014119] [2021-12-16 05:46:57,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:57,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:46:57,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:46:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:46:57,957 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:58,017 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-16 05:46:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:46:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:46:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:58,018 INFO L225 Difference]: With dead ends: 59 [2021-12-16 05:46:58,018 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 05:46:58,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:46:58,019 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:58,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-16 05:46:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 05:46:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2021-12-16 05:46:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-16 05:46:58,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2021-12-16 05:46:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:58,021 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-16 05:46:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-16 05:46:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:46:58,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:58,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:58,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 05:46:58,236 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2021-12-16 05:46:58,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:58,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676846382] [2021-12-16 05:46:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:58,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:58,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:58,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676846382] [2021-12-16 05:46:58,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676846382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:58,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273541620] [2021-12-16 05:46:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:58,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:58,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:58,330 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) [2021-12-16 05:46:58,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:46:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 05:46:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:58,432 INFO L388 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 14 treesize of output 10 [2021-12-16 05:46:58,464 INFO L388 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 15 treesize of output 7 [2021-12-16 05:46:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:58,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:58,496 INFO L388 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 13 treesize of output 11 [2021-12-16 05:46:58,497 INFO L388 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 20 treesize of output 18 [2021-12-16 05:46:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:58,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273541620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:58,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:58,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-16 05:46:58,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304447672] [2021-12-16 05:46:58,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:58,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:46:58,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:46:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:46:58,572 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:58,734 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-16 05:46:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:46:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:46:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:58,735 INFO L225 Difference]: With dead ends: 70 [2021-12-16 05:46:58,735 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 05:46:58,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:46:58,736 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:58,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 139 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 91 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-16 05:46:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 05:46:58,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-12-16 05:46:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-16 05:46:58,737 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2021-12-16 05:46:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:58,737 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-16 05:46:58,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-16 05:46:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:46:58,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:58,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:58,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-16 05:46:58,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:58,938 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash 186362076, now seen corresponding path program 1 times [2021-12-16 05:46:58,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:58,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271532922] [2021-12-16 05:46:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:58,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:46:58,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:58,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271532922] [2021-12-16 05:46:58,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271532922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:58,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:58,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:46:58,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966091618] [2021-12-16 05:46:58,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:58,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:46:58,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:58,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:46:58,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:58,988 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-16 05:46:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:58,998 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-16 05:46:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:46:58,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 18 [2021-12-16 05:46:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:58,999 INFO L225 Difference]: With dead ends: 39 [2021-12-16 05:46:58,999 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 05:46:58,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:46:58,999 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:58,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:46:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 05:46:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-16 05:46:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 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) [2021-12-16 05:46:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-16 05:46:59,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-16 05:46:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:59,001 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-16 05:46:59,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-16 05:46:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-16 05:46:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:46:59,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:59,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:59,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 05:46:59,002 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:59,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2146020323, now seen corresponding path program 2 times [2021-12-16 05:46:59,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:59,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963786761] [2021-12-16 05:46:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:59,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:59,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963786761] [2021-12-16 05:46:59,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963786761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925772193] [2021-12-16 05:46:59,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:46:59,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:59,110 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) [2021-12-16 05:46:59,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:46:59,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:46:59,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:46:59,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 05:46:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:59,206 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:46:59,206 INFO L388 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 [2021-12-16 05:46:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:59,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:59,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925772193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:59,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:46:59,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-16 05:46:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782269651] [2021-12-16 05:46:59,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:59,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 05:46:59,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:46:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 05:46:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:46:59,494 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 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) [2021-12-16 05:46:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:59,585 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-16 05:46:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:46:59,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 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) Word has length 21 [2021-12-16 05:46:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:59,586 INFO L225 Difference]: With dead ends: 31 [2021-12-16 05:46:59,586 INFO L226 Difference]: Without dead ends: 31 [2021-12-16 05:46:59,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:46:59,587 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:59,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 60 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:46:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-16 05:46:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-16 05:46:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 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) [2021-12-16 05:46:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-16 05:46:59,588 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-12-16 05:46:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:59,588 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-16 05:46:59,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 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) [2021-12-16 05:46:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-16 05:46:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 05:46:59,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:59,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:59,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:59,789 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,SelfDestructingSolverStorable17 [2021-12-16 05:46:59,789 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:46:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2102120586, now seen corresponding path program 1 times [2021-12-16 05:46:59,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:46:59,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670288925] [2021-12-16 05:46:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:59,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:46:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:59,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:46:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670288925] [2021-12-16 05:46:59,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670288925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:46:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566898025] [2021-12-16 05:46:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:59,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:46:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:46:59,864 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) [2021-12-16 05:46:59,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:46:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 05:46:59,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:59,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:46:59,929 INFO L388 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 [2021-12-16 05:46:59,947 INFO L388 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 [2021-12-16 05:47:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:00,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:00,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566898025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:00,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:00,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-12-16 05:47:00,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749323353] [2021-12-16 05:47:00,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:00,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 05:47:00,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:00,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 05:47:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:47:00,332 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 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) [2021-12-16 05:47:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:00,432 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-16 05:47:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:47:00,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 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) Word has length 22 [2021-12-16 05:47:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:00,433 INFO L225 Difference]: With dead ends: 30 [2021-12-16 05:47:00,433 INFO L226 Difference]: Without dead ends: 30 [2021-12-16 05:47:00,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:47:00,434 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:00,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 43 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:47:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-16 05:47:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-16 05:47:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-16 05:47:00,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2021-12-16 05:47:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:00,436 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-16 05:47:00,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 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) [2021-12-16 05:47:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-16 05:47:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:47:00,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:00,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:00,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:00,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:00,643 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 643759544, now seen corresponding path program 3 times [2021-12-16 05:47:00,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:00,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384984756] [2021-12-16 05:47:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:00,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:00,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384984756] [2021-12-16 05:47:00,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384984756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373077499] [2021-12-16 05:47:00,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:47:00,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:00,824 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) [2021-12-16 05:47:00,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:47:00,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 05:47:00,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 05:47:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:00,907 INFO L388 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 [2021-12-16 05:47:01,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-16 05:47:01,085 INFO L388 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 24 treesize of output 24 [2021-12-16 05:47:01,172 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-12-16 05:47:01,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-16 05:47:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:01,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:01,229 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_287) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (= 0 |c_ULTIMATE.start_cstpcpy_#t~mem4#1|)) is different from false [2021-12-16 05:47:01,235 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_287) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|) |c_ULTIMATE.start_cstpcpy_~from#1.offset|))) is different from false [2021-12-16 05:47:01,254 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString~0#1.base|) |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) (forall ((v_ArrVal_287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_287) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 1)) 0))) is different from false [2021-12-16 05:47:01,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2021-12-16 05:47:01,263 INFO L388 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 38 treesize of output 34 [2021-12-16 05:47:01,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:47:01,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2021-12-16 05:47:01,269 INFO L388 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 11 treesize of output 7 [2021-12-16 05:47:01,441 INFO L388 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 [2021-12-16 05:47:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-16 05:47:01,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373077499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:01,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:01,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 31 [2021-12-16 05:47:01,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688089573] [2021-12-16 05:47:01,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:01,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 05:47:01,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 05:47:01,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=655, Unknown=3, NotChecked=162, Total=930 [2021-12-16 05:47:01,457 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:01,838 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-16 05:47:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:47:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2021-12-16 05:47:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:01,839 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:47:01,839 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 05:47:01,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1277, Unknown=3, NotChecked=234, Total=1806 [2021-12-16 05:47:01,840 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:01,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 143 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2021-12-16 05:47:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 05:47:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-16 05:47:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-16 05:47:01,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2021-12-16 05:47:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:01,841 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-16 05:47:01,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-16 05:47:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:47:01,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:01,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:01,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:02,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:02,042 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1470618683, now seen corresponding path program 4 times [2021-12-16 05:47:02,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355196822] [2021-12-16 05:47:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:02,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:02,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355196822] [2021-12-16 05:47:02,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355196822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533793118] [2021-12-16 05:47:02,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:47:02,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:02,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:02,144 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) [2021-12-16 05:47:02,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:47:02,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:47:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 05:47:02,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:02,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:02,419 INFO L388 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 7 treesize of output 5 [2021-12-16 05:47:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533793118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:02,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:02,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-16 05:47:02,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320289552] [2021-12-16 05:47:02,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:02,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:47:02,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:47:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:47:02,446 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) [2021-12-16 05:47:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:02,576 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-12-16 05:47:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:47:02,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) Word has length 29 [2021-12-16 05:47:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:02,576 INFO L225 Difference]: With dead ends: 39 [2021-12-16 05:47:02,576 INFO L226 Difference]: Without dead ends: 39 [2021-12-16 05:47:02,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:47:02,577 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:02,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:47:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-16 05:47:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-16 05:47:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 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) [2021-12-16 05:47:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-16 05:47:02,578 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-12-16 05:47:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:02,578 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-16 05:47:02,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) [2021-12-16 05:47:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-16 05:47:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:47:02,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:02,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:02,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:02,779 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,SelfDestructingSolverStorable20 [2021-12-16 05:47:02,779 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:02,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1655461096, now seen corresponding path program 2 times [2021-12-16 05:47:02,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:02,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894924319] [2021-12-16 05:47:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:02,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:02,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:02,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894924319] [2021-12-16 05:47:02,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894924319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:02,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629788451] [2021-12-16 05:47:02,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:47:02,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:02,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:02,872 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) [2021-12-16 05:47:02,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:47:02,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:47:02,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-16 05:47:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:02,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:47:02,955 INFO L388 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 [2021-12-16 05:47:02,957 INFO L388 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 [2021-12-16 05:47:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:03,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:03,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629788451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:03,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:03,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-16 05:47:03,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213269785] [2021-12-16 05:47:03,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:47:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:47:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:47:03,345 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:03,516 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-16 05:47:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:47:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 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 30 [2021-12-16 05:47:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:03,518 INFO L225 Difference]: With dead ends: 38 [2021-12-16 05:47:03,518 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 05:47:03,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-12-16 05:47:03,519 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:03,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:47:03,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 05:47:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-16 05:47:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 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) [2021-12-16 05:47:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-16 05:47:03,521 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-12-16 05:47:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:03,521 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-16 05:47:03,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-16 05:47:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 05:47:03,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:03,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:03,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 05:47:03,739 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 5 times [2021-12-16 05:47:03,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133613417] [2021-12-16 05:47:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:03,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:03,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133613417] [2021-12-16 05:47:03,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133613417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015597093] [2021-12-16 05:47:03,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:47:03,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:03,943 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) [2021-12-16 05:47:03,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 05:47:04,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 05:47:04,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:04,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 05:47:04,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:04,046 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:04,047 INFO L388 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 [2021-12-16 05:47:04,202 INFO L388 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 16 treesize of output 12 [2021-12-16 05:47:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:47:04,269 INFO L388 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 [2021-12-16 05:47:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:47:04,321 INFO L388 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 [2021-12-16 05:47:04,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:04,381 INFO L388 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 19 treesize of output 19 [2021-12-16 05:47:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:04,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:09,864 INFO L388 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 378 treesize of output 366 [2021-12-16 05:47:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:10,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015597093] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:10,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:10,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 38 [2021-12-16 05:47:10,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751830179] [2021-12-16 05:47:10,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:10,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 05:47:10,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 05:47:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1270, Unknown=1, NotChecked=0, Total=1406 [2021-12-16 05:47:10,654 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:11,890 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-12-16 05:47:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 05:47:11,891 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 05:47:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:11,891 INFO L225 Difference]: With dead ends: 60 [2021-12-16 05:47:11,891 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 05:47:11,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=584, Invalid=3197, Unknown=1, NotChecked=0, Total=3782 [2021-12-16 05:47:11,892 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 220 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:11,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 155 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 412 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2021-12-16 05:47:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 05:47:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-12-16 05:47:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-16 05:47:11,894 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 33 [2021-12-16 05:47:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:11,894 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-16 05:47:11,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-16 05:47:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 05:47:11,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:11,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:11,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:12,100 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,SelfDestructingSolverStorable22 [2021-12-16 05:47:12,101 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1740941126, now seen corresponding path program 3 times [2021-12-16 05:47:12,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:12,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912966141] [2021-12-16 05:47:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:12,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:12,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912966141] [2021-12-16 05:47:12,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912966141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442887590] [2021-12-16 05:47:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:47:12,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:12,223 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) [2021-12-16 05:47:12,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 05:47:12,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:47:12,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:12,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 05:47:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:12,316 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:12,316 INFO L388 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 [2021-12-16 05:47:12,328 INFO L388 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 [2021-12-16 05:47:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 05:47:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 05:47:12,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442887590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:12,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:12,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-12-16 05:47:12,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947503158] [2021-12-16 05:47:12,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:12,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 05:47:12,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 05:47:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:47:12,919 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 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) [2021-12-16 05:47:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:13,414 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-16 05:47:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:47:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 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) Word has length 38 [2021-12-16 05:47:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:13,414 INFO L225 Difference]: With dead ends: 59 [2021-12-16 05:47:13,414 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 05:47:13,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 05:47:13,415 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:13,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 147 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-12-16 05:47:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 05:47:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-16 05:47:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-16 05:47:13,417 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2021-12-16 05:47:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:13,417 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-16 05:47:13,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 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) [2021-12-16 05:47:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-16 05:47:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 05:47:13,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:13,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:13,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:13,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:13,618 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1647975924, now seen corresponding path program 6 times [2021-12-16 05:47:13,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:13,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211095466] [2021-12-16 05:47:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:13,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:13,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211095466] [2021-12-16 05:47:13,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211095466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691775850] [2021-12-16 05:47:13,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:47:13,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:13,866 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) [2021-12-16 05:47:13,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 05:47:13,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 05:47:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-16 05:47:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:13,979 INFO L388 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 [2021-12-16 05:47:14,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-16 05:47:14,238 INFO L388 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 17 treesize of output 19 [2021-12-16 05:47:14,308 INFO L388 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 16 treesize of output 18 [2021-12-16 05:47:14,323 INFO L388 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 16 treesize of output 18 [2021-12-16 05:47:14,342 INFO L388 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 15 treesize of output 7 [2021-12-16 05:47:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:14,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:14,374 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_503) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-16 05:47:14,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_503) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-16 05:47:14,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_503) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-16 05:47:14,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_503) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 3)) 0)) is different from false [2021-12-16 05:47:14,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:14,402 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-16 05:47:14,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:14,406 INFO L388 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 37 treesize of output 37 [2021-12-16 05:47:14,408 INFO L388 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 11 treesize of output 7 [2021-12-16 05:47:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 20 not checked. [2021-12-16 05:47:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691775850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:14,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:14,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 31 [2021-12-16 05:47:14,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494372679] [2021-12-16 05:47:14,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:14,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 05:47:14,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:14,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 05:47:14,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=631, Unknown=4, NotChecked=212, Total=930 [2021-12-16 05:47:14,573 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:14,862 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-16 05:47:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:47:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 41 [2021-12-16 05:47:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:14,864 INFO L225 Difference]: With dead ends: 80 [2021-12-16 05:47:14,864 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 05:47:14,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=1123, Unknown=4, NotChecked=284, Total=1560 [2021-12-16 05:47:14,869 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:14,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 236 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 193 Unchecked, 0.1s Time] [2021-12-16 05:47:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 05:47:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-12-16 05:47:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.103448275862069) 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) [2021-12-16 05:47:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-16 05:47:14,881 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 41 [2021-12-16 05:47:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:14,881 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-16 05:47:14,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-16 05:47:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:47:14,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:14,883 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:14,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:15,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:15,089 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1728866697, now seen corresponding path program 7 times [2021-12-16 05:47:15,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:15,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721889216] [2021-12-16 05:47:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:15,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:15,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721889216] [2021-12-16 05:47:15,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721889216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311965639] [2021-12-16 05:47:15,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 05:47:15,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:15,287 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) [2021-12-16 05:47:15,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 05:47:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 05:47:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:15,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:15,723 INFO L388 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 7 treesize of output 5 [2021-12-16 05:47:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:15,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311965639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:15,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:15,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2021-12-16 05:47:15,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985468885] [2021-12-16 05:47:15,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:15,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 05:47:15,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 05:47:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:47:15,754 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 29 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:15,997 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-12-16 05:47:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:47:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 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 45 [2021-12-16 05:47:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:15,998 INFO L225 Difference]: With dead ends: 60 [2021-12-16 05:47:15,998 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 05:47:15,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 05:47:15,999 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:15,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 161 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:47:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 05:47:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-16 05:47:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-12-16 05:47:16,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2021-12-16 05:47:16,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:16,000 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-12-16 05:47:16,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-12-16 05:47:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 05:47:16,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:16,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:16,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-16 05:47:16,201 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,SelfDestructingSolverStorable25 [2021-12-16 05:47:16,201 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 8 times [2021-12-16 05:47:16,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929660211] [2021-12-16 05:47:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:16,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:16,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929660211] [2021-12-16 05:47:16,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929660211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195712726] [2021-12-16 05:47:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:47:16,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:16,535 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) [2021-12-16 05:47:16,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 05:47:16,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:47:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:16,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-16 05:47:16,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:16,630 INFO L388 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 [2021-12-16 05:47:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-16 05:47:16,943 INFO L388 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 17 treesize of output 19 [2021-12-16 05:47:16,977 INFO L388 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 16 treesize of output 18 [2021-12-16 05:47:17,005 INFO L388 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 16 treesize of output 18 [2021-12-16 05:47:17,019 INFO L388 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 16 treesize of output 18 [2021-12-16 05:47:17,040 INFO L388 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 15 treesize of output 7 [2021-12-16 05:47:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:17,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:17,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-16 05:47:17,076 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-16 05:47:17,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-16 05:47:17,095 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-16 05:47:17,103 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_614) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2021-12-16 05:47:17,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:17,107 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-16 05:47:17,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:17,111 INFO L388 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 37 treesize of output 37 [2021-12-16 05:47:17,113 INFO L388 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 11 treesize of output 7 [2021-12-16 05:47:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2021-12-16 05:47:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195712726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:17,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:17,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 35 [2021-12-16 05:47:17,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196033894] [2021-12-16 05:47:17,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:17,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 05:47:17,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:17,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 05:47:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=793, Unknown=5, NotChecked=300, Total=1190 [2021-12-16 05:47:17,348 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:17,973 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-12-16 05:47:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:47:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 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 [2021-12-16 05:47:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:17,974 INFO L225 Difference]: With dead ends: 88 [2021-12-16 05:47:17,974 INFO L226 Difference]: Without dead ends: 67 [2021-12-16 05:47:17,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=1615, Unknown=5, NotChecked=430, Total=2256 [2021-12-16 05:47:17,975 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:17,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 336 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 686 Invalid, 0 Unknown, 284 Unchecked, 0.3s Time] [2021-12-16 05:47:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-16 05:47:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-16 05:47:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-16 05:47:17,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 49 [2021-12-16 05:47:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:17,977 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-16 05:47:17,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-16 05:47:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:47:17,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:17,977 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:18,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:18,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 05:47:18,178 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1870280555, now seen corresponding path program 9 times [2021-12-16 05:47:18,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:18,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745715001] [2021-12-16 05:47:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:18,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:18,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745715001] [2021-12-16 05:47:18,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745715001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927332572] [2021-12-16 05:47:18,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:47:18,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:18,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:18,396 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) [2021-12-16 05:47:18,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 05:47:18,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 05:47:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:18,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-16 05:47:18,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:18,558 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:18,558 INFO L388 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 [2021-12-16 05:47:18,566 INFO L388 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 [2021-12-16 05:47:18,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-12-16 05:47:18,836 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:18,893 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:18,939 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:18,991 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:19,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:19,043 INFO L388 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 19 treesize of output 19 [2021-12-16 05:47:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 05:47:19,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:19,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:19,649 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-16 05:47:19,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:19,655 INFO L388 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 37 treesize of output 37 [2021-12-16 05:47:19,658 INFO L388 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 11 treesize of output 7 [2021-12-16 05:47:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 05:47:20,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927332572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:20,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:20,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2021-12-16 05:47:20,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016254233] [2021-12-16 05:47:20,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:20,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-16 05:47:20,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-16 05:47:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1527, Unknown=1, NotChecked=0, Total=1722 [2021-12-16 05:47:20,063 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:21,830 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-12-16 05:47:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 05:47:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 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 [2021-12-16 05:47:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:21,831 INFO L225 Difference]: With dead ends: 72 [2021-12-16 05:47:21,831 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 05:47:21,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=809, Invalid=4720, Unknown=21, NotChecked=0, Total=5550 [2021-12-16 05:47:21,833 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:21,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 286 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 598 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2021-12-16 05:47:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 05:47:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-12-16 05:47:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-12-16 05:47:21,837 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 53 [2021-12-16 05:47:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:21,838 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-12-16 05:47:21,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-12-16 05:47:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 05:47:21,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:21,839 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:21,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:22,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 05:47:22,052 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:22,053 INFO L85 PathProgramCache]: Analyzing trace with hash -572986616, now seen corresponding path program 4 times [2021-12-16 05:47:22,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:22,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918588809] [2021-12-16 05:47:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:22,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 76 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:47:22,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918588809] [2021-12-16 05:47:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918588809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665102421] [2021-12-16 05:47:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:47:22,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:22,277 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) [2021-12-16 05:47:22,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 05:47:22,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:47:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 05:47:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:22,384 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:22,384 INFO L388 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 [2021-12-16 05:47:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 97 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:47:22,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 91 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:47:23,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665102421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:23,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:23,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 41 [2021-12-16 05:47:23,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196379055] [2021-12-16 05:47:23,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:23,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 05:47:23,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 05:47:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 05:47:23,003 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:23,439 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-12-16 05:47:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 05:47:23,439 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 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 62 [2021-12-16 05:47:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:23,440 INFO L225 Difference]: With dead ends: 105 [2021-12-16 05:47:23,440 INFO L226 Difference]: Without dead ends: 78 [2021-12-16 05:47:23,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=2376, Unknown=0, NotChecked=0, Total=2970 [2021-12-16 05:47:23,441 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:23,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 134 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:47:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-16 05:47:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-16 05:47:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-16 05:47:23,442 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 62 [2021-12-16 05:47:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:23,442 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-16 05:47:23,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-16 05:47:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 05:47:23,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:23,443 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:23,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:23,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 05:47:23,643 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -894897563, now seen corresponding path program 5 times [2021-12-16 05:47:23,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21728435] [2021-12-16 05:47:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:23,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:23,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21728435] [2021-12-16 05:47:23,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21728435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616547791] [2021-12-16 05:47:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:47:23,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:23,868 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) [2021-12-16 05:47:23,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 05:47:24,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 05:47:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:24,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 05:47:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:24,206 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:24,206 INFO L388 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 [2021-12-16 05:47:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:24,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:25,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616547791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:25,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:25,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 47 [2021-12-16 05:47:25,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539291371] [2021-12-16 05:47:25,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 05:47:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 05:47:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1747, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 05:47:25,210 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:25,468 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-12-16 05:47:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:47:25,469 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 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 66 [2021-12-16 05:47:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:25,469 INFO L225 Difference]: With dead ends: 113 [2021-12-16 05:47:25,469 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 05:47:25,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=661, Invalid=2419, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 05:47:25,470 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:25,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 97 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:47:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 05:47:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-12-16 05:47:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-12-16 05:47:25,472 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 66 [2021-12-16 05:47:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:25,472 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-12-16 05:47:25,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-12-16 05:47:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 05:47:25,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:25,473 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:25,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:25,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:25,673 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash 926679874, now seen corresponding path program 6 times [2021-12-16 05:47:25,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979047442] [2021-12-16 05:47:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:25,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 66 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:25,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979047442] [2021-12-16 05:47:25,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979047442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244999488] [2021-12-16 05:47:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:47:25,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:25,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:25,958 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) [2021-12-16 05:47:25,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 05:47:26,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 05:47:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-16 05:47:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:26,312 INFO L388 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 [2021-12-16 05:47:26,316 INFO L388 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 [2021-12-16 05:47:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 91 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:26,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 120 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:27,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244999488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:27,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:27,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2021-12-16 05:47:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905695725] [2021-12-16 05:47:27,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:27,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-16 05:47:27,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-16 05:47:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2021-12-16 05:47:27,380 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:28,015 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-16 05:47:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:47:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 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 70 [2021-12-16 05:47:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:28,017 INFO L225 Difference]: With dead ends: 79 [2021-12-16 05:47:28,017 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 05:47:28,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1000, Invalid=4256, Unknown=0, NotChecked=0, Total=5256 [2021-12-16 05:47:28,019 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 320 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:28,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 223 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:47:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 05:47:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-12-16 05:47:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-16 05:47:28,023 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 70 [2021-12-16 05:47:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:28,023 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-16 05:47:28,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-16 05:47:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 05:47:28,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:28,024 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:28,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:28,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:28,243 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1730266887, now seen corresponding path program 7 times [2021-12-16 05:47:28,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:28,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746740992] [2021-12-16 05:47:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:28,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:28,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746740992] [2021-12-16 05:47:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746740992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531232578] [2021-12-16 05:47:28,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 05:47:28,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:28,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:28,490 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) [2021-12-16 05:47:28,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 05:47:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 05:47:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:28,642 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:28,642 INFO L388 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 [2021-12-16 05:47:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:29,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 120 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:29,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531232578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:29,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:29,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2021-12-16 05:47:29,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734387807] [2021-12-16 05:47:29,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:29,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-16 05:47:29,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-16 05:47:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2149, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 05:47:29,495 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:29,802 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-12-16 05:47:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:47:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 states have internal predecessors, (181), 0 states have call successors, (0), 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 74 [2021-12-16 05:47:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:29,803 INFO L225 Difference]: With dead ends: 121 [2021-12-16 05:47:29,803 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 05:47:29,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=800, Invalid=2982, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 05:47:29,804 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:29,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 113 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:47:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 05:47:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-12-16 05:47:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-16 05:47:29,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 74 [2021-12-16 05:47:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:29,806 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-16 05:47:29,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-16 05:47:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-16 05:47:29,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:29,806 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:29,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:30,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:30,015 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash -692540700, now seen corresponding path program 8 times [2021-12-16 05:47:30,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394744175] [2021-12-16 05:47:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:30,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 91 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:30,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394744175] [2021-12-16 05:47:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394744175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:30,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684438111] [2021-12-16 05:47:30,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:47:30,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:30,300 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) [2021-12-16 05:47:30,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 05:47:30,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:47:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:30,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 05:47:30,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:47:30,429 INFO L388 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 [2021-12-16 05:47:30,432 INFO L388 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 [2021-12-16 05:47:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 120 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:31,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 153 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:32,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684438111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:32,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 59 [2021-12-16 05:47:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090350992] [2021-12-16 05:47:32,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:32,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-16 05:47:32,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-16 05:47:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 05:47:32,056 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 60 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 60 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) [2021-12-16 05:47:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:32,989 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-16 05:47:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:47:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 60 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 78 [2021-12-16 05:47:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:32,990 INFO L225 Difference]: With dead ends: 86 [2021-12-16 05:47:32,990 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 05:47:32,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1112, Invalid=5050, Unknown=0, NotChecked=0, Total=6162 [2021-12-16 05:47:32,991 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:32,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 415 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:47:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 05:47:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-12-16 05:47:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-16 05:47:32,992 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2021-12-16 05:47:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:32,992 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-16 05:47:32,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 60 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) [2021-12-16 05:47:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-16 05:47:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 05:47:32,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:32,996 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:33,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:33,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:33,207 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1542890378, now seen corresponding path program 10 times [2021-12-16 05:47:33,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861442901] [2021-12-16 05:47:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:33,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:33,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861442901] [2021-12-16 05:47:33,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861442901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785407499] [2021-12-16 05:47:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:47:33,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:33,659 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) [2021-12-16 05:47:33,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 05:47:33,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:47:33,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-16 05:47:33,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:33,796 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:33,796 INFO L388 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 [2021-12-16 05:47:33,800 INFO L388 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 [2021-12-16 05:47:34,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 14 treesize of output 10 [2021-12-16 05:47:34,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-16 05:47:34,259 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,297 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,336 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,379 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,420 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,481 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,541 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,636 INFO L388 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 14 treesize of output 16 [2021-12-16 05:47:34,683 INFO L388 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 15 treesize of output 7 [2021-12-16 05:47:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:34,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:34,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-16 05:47:34,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-16 05:47:34,770 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-16 05:47:34,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-16 05:47:34,809 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-16 05:47:34,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-16 05:47:34,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-16 05:47:34,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-16 05:47:34,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:34,933 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-16 05:47:34,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:34,937 INFO L388 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 37 treesize of output 37 [2021-12-16 05:47:34,939 INFO L388 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 11 treesize of output 7 [2021-12-16 05:47:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 134 not checked. [2021-12-16 05:47:35,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785407499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:35,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:35,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 70 [2021-12-16 05:47:35,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805834687] [2021-12-16 05:47:35,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:35,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-16 05:47:35,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-16 05:47:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3613, Unknown=8, NotChecked=1016, Total=4830 [2021-12-16 05:47:35,807 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:37,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:37,883 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-16 05:47:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 05:47:37,884 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 0 states have call successors, (0), 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 81 [2021-12-16 05:47:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:37,884 INFO L225 Difference]: With dead ends: 128 [2021-12-16 05:47:37,884 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 05:47:37,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=456, Invalid=7224, Unknown=8, NotChecked=1432, Total=9120 [2021-12-16 05:47:37,885 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:37,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 922 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2430 Invalid, 0 Unknown, 713 Unchecked, 0.9s Time] [2021-12-16 05:47:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 05:47:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-16 05:47:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-16 05:47:37,887 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2021-12-16 05:47:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:37,887 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-16 05:47:37,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-16 05:47:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 05:47:37,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:37,888 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:37,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-16 05:47:38,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:38,099 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1345446643, now seen corresponding path program 11 times [2021-12-16 05:47:38,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918552402] [2021-12-16 05:47:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:38,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 120 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:38,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:38,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918552402] [2021-12-16 05:47:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918552402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755360251] [2021-12-16 05:47:38,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:47:38,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:38,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:38,492 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) [2021-12-16 05:47:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 05:47:39,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-16 05:47:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-16 05:47:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:39,046 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:39,047 INFO L388 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 [2021-12-16 05:47:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 153 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:39,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 190 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755360251] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:40,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 63 [2021-12-16 05:47:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847392615] [2021-12-16 05:47:40,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-16 05:47:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-16 05:47:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=3474, Unknown=0, NotChecked=0, Total=4032 [2021-12-16 05:47:40,764 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 64 states, 63 states have (on average 3.857142857142857) internal successors, (243), 64 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:41,370 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-12-16 05:47:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:47:41,371 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.857142857142857) internal successors, (243), 64 states have internal predecessors, (243), 0 states have call successors, (0), 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 85 [2021-12-16 05:47:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:41,371 INFO L225 Difference]: With dead ends: 95 [2021-12-16 05:47:41,371 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 05:47:41,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1062, Invalid=4638, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 05:47:41,372 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 314 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:41,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 369 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:47:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 05:47:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-12-16 05:47:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-12-16 05:47:41,374 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2021-12-16 05:47:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:41,374 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-12-16 05:47:41,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.857142857142857) internal successors, (243), 64 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-12-16 05:47:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 05:47:41,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:41,375 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:41,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:41,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-16 05:47:41,575 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1240827014, now seen corresponding path program 9 times [2021-12-16 05:47:41,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596061530] [2021-12-16 05:47:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 120 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:41,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596061530] [2021-12-16 05:47:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596061530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123050476] [2021-12-16 05:47:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:47:41,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:41,897 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:47:41,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 05:47:42,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-16 05:47:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:42,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-16 05:47:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:42,561 INFO L388 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 [2021-12-16 05:47:42,566 INFO L388 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 [2021-12-16 05:47:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 05:47:43,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 05:47:44,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123050476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:44,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:44,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 48 [2021-12-16 05:47:44,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576625902] [2021-12-16 05:47:44,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:44,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 05:47:44,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 05:47:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 05:47:44,540 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 49 states, 48 states have (on average 3.7083333333333335) internal successors, (178), 49 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:47,582 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2021-12-16 05:47:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 05:47:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.7083333333333335) internal successors, (178), 49 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-16 05:47:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:47,583 INFO L225 Difference]: With dead ends: 137 [2021-12-16 05:47:47,583 INFO L226 Difference]: Without dead ends: 137 [2021-12-16 05:47:47,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1484, Invalid=6526, Unknown=0, NotChecked=0, Total=8010 [2021-12-16 05:47:47,584 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 367 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:47,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 476 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1293 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2021-12-16 05:47:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-16 05:47:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2021-12-16 05:47:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 127 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-16 05:47:47,585 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 86 [2021-12-16 05:47:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:47,586 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-16 05:47:47,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.7083333333333335) internal successors, (178), 49 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-16 05:47:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 05:47:47,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:47,586 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:47,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-16 05:47:47,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-16 05:47:47,787 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:47,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1305948504, now seen corresponding path program 12 times [2021-12-16 05:47:47,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:47,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965986668] [2021-12-16 05:47:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:47,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:48,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965986668] [2021-12-16 05:47:48,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965986668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930447057] [2021-12-16 05:47:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:47:48,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:48,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:48,349 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:47:48,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 05:47:49,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-16 05:47:49,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-16 05:47:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:49,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:49,868 INFO L388 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 [2021-12-16 05:47:49,874 INFO L388 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 [2021-12-16 05:47:50,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2021-12-16 05:47:50,208 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,227 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,244 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,263 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,280 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,298 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,317 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,337 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,356 INFO L388 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 18 treesize of output 20 [2021-12-16 05:47:50,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:50,398 INFO L388 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 19 treesize of output 19 [2021-12-16 05:47:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-16 05:47:50,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:51,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:51,299 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-16 05:47:51,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:47:51,305 INFO L388 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 33 treesize of output 33 [2021-12-16 05:47:51,309 INFO L388 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 9 treesize of output 7 [2021-12-16 05:47:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-16 05:47:51,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930447057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:51,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:51,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 8] total 41 [2021-12-16 05:47:51,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023939118] [2021-12-16 05:47:51,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:51,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 05:47:51,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 05:47:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1508, Unknown=34, NotChecked=0, Total=1640 [2021-12-16 05:47:51,916 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:56,328 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-12-16 05:47:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 05:47:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 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 89 [2021-12-16 05:47:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:56,330 INFO L225 Difference]: With dead ends: 172 [2021-12-16 05:47:56,330 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 05:47:56,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1019, Invalid=8831, Unknown=50, NotChecked=0, Total=9900 [2021-12-16 05:47:56,353 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:56,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 475 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1981 Invalid, 0 Unknown, 96 Unchecked, 0.8s Time] [2021-12-16 05:47:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 05:47:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-16 05:47:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-12-16 05:47:56,357 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 89 [2021-12-16 05:47:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:56,357 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-12-16 05:47:56,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-12-16 05:47:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 05:47:56,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:56,358 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:56,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:56,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-16 05:47:56,571 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -94208747, now seen corresponding path program 10 times [2021-12-16 05:47:56,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558823254] [2021-12-16 05:47:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:56,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 561 proven. 272 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-16 05:47:56,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558823254] [2021-12-16 05:47:56,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558823254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708213231] [2021-12-16 05:47:56,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:47:56,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:56,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:56,988 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:47:57,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 05:47:57,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:47:57,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:47:57,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 05:47:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:57,243 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:47:57,243 INFO L388 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 [2021-12-16 05:47:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 602 proven. 231 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-16 05:47:58,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:47:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 591 proven. 242 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-16 05:47:58,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708213231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:47:58,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:47:58,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 67 [2021-12-16 05:47:58,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740275953] [2021-12-16 05:47:58,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:47:58,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-16 05:47:58,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:58,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-16 05:47:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3595, Unknown=0, NotChecked=0, Total=4422 [2021-12-16 05:47:58,561 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 67 states, 67 states have (on average 3.656716417910448) internal successors, (245), 67 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:59,000 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2021-12-16 05:47:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 05:47:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.656716417910448) internal successors, (245), 67 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-16 05:47:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:59,001 INFO L225 Difference]: With dead ends: 185 [2021-12-16 05:47:59,001 INFO L226 Difference]: Without dead ends: 138 [2021-12-16 05:47:59,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1310, Invalid=5010, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 05:47:59,003 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:59,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 154 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:47:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-16 05:47:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-12-16 05:47:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-12-16 05:47:59,007 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2021-12-16 05:47:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:59,007 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-12-16 05:47:59,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.656716417910448) internal successors, (245), 67 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-12-16 05:47:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-16 05:47:59,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:59,008 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:59,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-16 05:47:59,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:59,224 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:47:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1690314226, now seen corresponding path program 11 times [2021-12-16 05:47:59,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:59,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036711445] [2021-12-16 05:47:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:59,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 586 proven. 321 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-16 05:47:59,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:59,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036711445] [2021-12-16 05:47:59,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036711445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:59,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826982399] [2021-12-16 05:47:59,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:47:59,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:59,629 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:47:59,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 05:48:07,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-16 05:48:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:07,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-16 05:48:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates...