./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/strreplace-alloca-2.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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:01:44,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:01:44,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:01:44,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:01:44,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:01:44,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:01:44,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:01:44,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:01:44,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:01:44,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:01:44,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:01:44,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:01:44,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:01:44,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:01:44,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:01:44,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:01:44,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:01:44,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:01:44,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:01:44,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:01:44,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:01:45,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:01:45,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:01:45,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:01:45,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:01:45,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:01:45,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:01:45,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:01:45,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:01:45,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:01:45,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:01:45,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:01:45,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:01:45,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:01:45,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:01:45,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:01:45,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:01:45,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:01:45,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:01:45,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:01:45,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:01:45,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:01:45,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:01:45,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:01:45,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:01:45,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:01:45,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:01:45,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:01:45,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:01:45,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:01:45,037 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:01:45,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:01:45,038 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:01:45,038 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:01:45,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:01:45,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:01:45,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:01:45,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:01:45,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:01:45,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:01:45,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:01:45,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:45,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:01:45,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:01:45,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:01:45,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:01:45,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:01:45,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2021-12-21 18:01:45,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:01:45,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:01:45,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:01:45,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:01:45,287 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:01:45,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-12-21 18:01:45,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bf30933/e22becf7520249c4afb327bf00a8a92c/FLAGc78589967 [2021-12-21 18:01:45,768 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:01:45,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-12-21 18:01:45,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bf30933/e22becf7520249c4afb327bf00a8a92c/FLAGc78589967 [2021-12-21 18:01:46,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bf30933/e22becf7520249c4afb327bf00a8a92c [2021-12-21 18:01:46,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:01:46,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:01:46,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:46,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:01:46,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:01:46,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5b934e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46, skipping insertion in model container [2021-12-21 18:01:46,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:01:46,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:01:46,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:46,471 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:01:46,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:46,552 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:01:46,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46 WrapperNode [2021-12-21 18:01:46,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:46,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:46,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:01:46,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:01:46,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,604 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2021-12-21 18:01:46,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:46,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:01:46,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:01:46,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:01:46,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:01:46,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:01:46,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:01:46,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:01:46,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (1/1) ... [2021-12-21 18:01:46,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:46,685 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) [2021-12-21 18:01:46,704 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 [2021-12-21 18:01:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 18:01:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 18:01:46,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:01:46,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:01:46,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:01:46,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:01:46,785 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:01:46,787 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:01:46,990 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:01:47,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:01:47,007 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 18:01:47,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:47 BoogieIcfgContainer [2021-12-21 18:01:47,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:01:47,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:01:47,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:01:47,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:01:47,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:01:46" (1/3) ... [2021-12-21 18:01:47,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597f388f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:47, skipping insertion in model container [2021-12-21 18:01:47,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:46" (2/3) ... [2021-12-21 18:01:47,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597f388f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:47, skipping insertion in model container [2021-12-21 18:01:47,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:47" (3/3) ... [2021-12-21 18:01:47,035 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2021-12-21 18:01:47,038 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:01:47,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-21 18:01:47,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:01:47,082 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 [2021-12-21 18:01:47,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-21 18:01:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) 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) [2021-12-21 18:01:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:47,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-21 18:01:47,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024578133] [2021-12-21 18:01:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024578133] [2021-12-21 18:01:47,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024578133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:47,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873699075] [2021-12-21 18:01:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:47,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:47,251 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) 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) 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) [2021-12-21 18:01:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,293 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-12-21 18:01:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:47,296 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 [2021-12-21 18:01:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,301 INFO L225 Difference]: With dead ends: 58 [2021-12-21 18:01:47,301 INFO L226 Difference]: Without dead ends: 54 [2021-12-21 18:01:47,303 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 [2021-12-21 18:01:47,308 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-21 18:01:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-12-21 18:01:47,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 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) [2021-12-21 18:01:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-21 18:01:47,334 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2021-12-21 18:01:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,335 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-21 18:01:47,335 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) [2021-12-21 18:01:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-21 18:01:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:47,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:01:47,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-21 18:01:47,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204222568] [2021-12-21 18:01:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204222568] [2021-12-21 18:01:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204222568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:01:47,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167523856] [2021-12-21 18:01:47,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:01:47,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:01:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:47,402 INFO L87 Difference]: Start difference. First operand 33 states and 36 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) [2021-12-21 18:01:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,430 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-12-21 18:01:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:01:47,431 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 [2021-12-21 18:01:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,431 INFO L225 Difference]: With dead ends: 31 [2021-12-21 18:01:47,432 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 18:01:47,432 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 [2021-12-21 18:01:47,436 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 18:01:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-21 18:01:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-21 18:01:47,445 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2021-12-21 18:01:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,446 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-21 18:01:47,446 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) [2021-12-21 18:01:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-21 18:01:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:47,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:01:47,448 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-21 18:01:47,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135986209] [2021-12-21 18:01:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135986209] [2021-12-21 18:01:47,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135986209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:47,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862680706] [2021-12-21 18:01:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:47,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:47,525 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,556 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-21 18:01:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:01:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,558 INFO L225 Difference]: With dead ends: 30 [2021-12-21 18:01:47,558 INFO L226 Difference]: Without dead ends: 30 [2021-12-21 18:01:47,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:47,563 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-21 18:01:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-21 18:01:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 29 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) [2021-12-21 18:01:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-21 18:01:47,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2021-12-21 18:01:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,568 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-21 18:01:47,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-21 18:01:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:01:47,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:01:47,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-21 18:01:47,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67321025] [2021-12-21 18:01:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67321025] [2021-12-21 18:01:47,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67321025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:47,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786106758] [2021-12-21 18:01:47,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:47,628 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,678 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-12-21 18:01:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:01:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,681 INFO L225 Difference]: With dead ends: 53 [2021-12-21 18:01:47,681 INFO L226 Difference]: Without dead ends: 53 [2021-12-21 18:01:47,681 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 [2021-12-21 18:01:47,686 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-21 18:01:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-12-21 18:01:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-21 18:01:47,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-21 18:01:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,694 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-21 18:01:47,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-21 18:01:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:01:47,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 18:01:47,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,695 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-12-21 18:01:47,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111977130] [2021-12-21 18:01:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111977130] [2021-12-21 18:01:47,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111977130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:47,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660339792] [2021-12-21 18:01:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:47,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:47,740 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,776 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-21 18:01:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 18:01:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,777 INFO L225 Difference]: With dead ends: 29 [2021-12-21 18:01:47,777 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 18:01:47,777 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 [2021-12-21 18:01:47,778 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 18:01:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-21 18:01:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 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) [2021-12-21 18:01:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-21 18:01:47,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-12-21 18:01:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,780 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-21 18:01:47,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-21 18:01:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:01:47,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 18:01:47,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-12-21 18:01:47,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690458893] [2021-12-21 18:01:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690458893] [2021-12-21 18:01:47,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690458893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:47,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:47,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:47,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254040330] [2021-12-21 18:01:47,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:47,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:47,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:47,892 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:47,930 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-12-21 18:01:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 18:01:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:47,931 INFO L225 Difference]: With dead ends: 40 [2021-12-21 18:01:47,931 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 18:01:47,932 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 [2021-12-21 18:01:47,932 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:47,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 18:01:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-21 18:01:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 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) [2021-12-21 18:01:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-21 18:01:47,934 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2021-12-21 18:01:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:47,935 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-21 18:01:47,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-21 18:01:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:01:47,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:47,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:47,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 18:01:47,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-21 18:01:47,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:47,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567056133] [2021-12-21 18:01:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:47,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567056133] [2021-12-21 18:01:47,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567056133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:47,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271839508] [2021-12-21 18:01:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:47,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:47,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:48,004 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) [2021-12-21 18:01:48,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:01:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:01:48,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:48,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:48,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271839508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:48,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:48,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-21 18:01:48,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696287734] [2021-12-21 18:01:48,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:48,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:01:48,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:01:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:48,297 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:48,400 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-12-21 18:01:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 18:01:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:48,401 INFO L225 Difference]: With dead ends: 78 [2021-12-21 18:01:48,401 INFO L226 Difference]: Without dead ends: 78 [2021-12-21 18:01:48,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:01:48,402 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:48,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 107 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-21 18:01:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2021-12-21 18:01:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 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) [2021-12-21 18:01:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-21 18:01:48,404 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2021-12-21 18:01:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:48,405 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-21 18:01:48,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-21 18:01:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 18:01:48,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:48,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:48,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:48,622 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2021-12-21 18:01:48,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:48,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198564187] [2021-12-21 18:01:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:48,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:48,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198564187] [2021-12-21 18:01:48,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198564187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:48,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:48,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:48,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606507839] [2021-12-21 18:01:48,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:48,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:48,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:48,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:48,698 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:48,724 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-12-21 18:01:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 18:01:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:48,725 INFO L225 Difference]: With dead ends: 30 [2021-12-21 18:01:48,726 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 18:01:48,726 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 [2021-12-21 18:01:48,726 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:48,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 18:01:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-21 18:01:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 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) [2021-12-21 18:01:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-21 18:01:48,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2021-12-21 18:01:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-21 18:01:48,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-21 18:01:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:01:48,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:48,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 18:01:48,731 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2021-12-21 18:01:48,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197275423] [2021-12-21 18:01:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:48,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:48,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197275423] [2021-12-21 18:01:48,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197275423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:48,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:48,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:01:48,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112284941] [2021-12-21 18:01:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:48,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:01:48,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:01:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:01:48,872 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-12-21 18:01:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:48,945 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-12-21 18:01:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 [2021-12-21 18:01:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:48,947 INFO L225 Difference]: With dead ends: 31 [2021-12-21 18:01:48,947 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 18:01:48,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:48,950 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:48,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 18:01:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-21 18:01:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 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) [2021-12-21 18:01:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-21 18:01:48,961 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2021-12-21 18:01:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:48,961 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-21 18:01:48,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-12-21 18:01:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-21 18:01:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:01:48,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:48,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 18:01:48,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2021-12-21 18:01:48,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:48,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464606539] [2021-12-21 18:01:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:48,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464606539] [2021-12-21 18:01:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464606539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:49,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:49,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:01:49,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739688559] [2021-12-21 18:01:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:49,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:01:49,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:01:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:01:49,088 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-21 18:01:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:49,162 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-21 18:01:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:01:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 [2021-12-21 18:01:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:49,164 INFO L225 Difference]: With dead ends: 33 [2021-12-21 18:01:49,164 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 18:01:49,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:49,165 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:49,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 18:01:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-21 18:01:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) 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) [2021-12-21 18:01:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-21 18:01:49,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2021-12-21 18:01:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:49,174 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-21 18:01:49,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-21 18:01:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-21 18:01:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:01:49,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:49,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:49,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 18:01:49,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:49,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2021-12-21 18:01:49,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:49,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932082698] [2021-12-21 18:01:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:49,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:49,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932082698] [2021-12-21 18:01:49,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932082698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:49,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584854423] [2021-12-21 18:01:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:49,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:49,328 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) [2021-12-21 18:01:49,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:01:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 18:01:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:49,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:01:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:49,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584854423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:49,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:49,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-12-21 18:01:49,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691201842] [2021-12-21 18:01:49,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:49,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:01:49,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:01:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:01:49,686 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 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) [2021-12-21 18:01:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:49,860 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-12-21 18:01:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:01:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 18:01:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:49,861 INFO L225 Difference]: With dead ends: 36 [2021-12-21 18:01:49,861 INFO L226 Difference]: Without dead ends: 36 [2021-12-21 18:01:49,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:01:49,862 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:49,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 73 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-21 18:01:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-12-21 18:01:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) 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) [2021-12-21 18:01:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-21 18:01:49,864 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2021-12-21 18:01:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:49,864 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-21 18:01:49,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 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) [2021-12-21 18:01:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-21 18:01:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:01:49,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:49,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:49,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 18:01:50,090 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,SelfDestructingSolverStorable10 [2021-12-21 18:01:50,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2021-12-21 18:01:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969604901] [2021-12-21 18:01:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:50,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:50,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:50,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969604901] [2021-12-21 18:01:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969604901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535964214] [2021-12-21 18:01:50,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:50,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:50,256 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) [2021-12-21 18:01:50,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:01:50,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 18:01:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:50,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:50,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:50,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-21 18:01:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:50,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:51,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:01:51,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 18:01:51,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:01:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:51,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535964214] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:51,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:51,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-12-21 18:01:51,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732994540] [2021-12-21 18:01:51,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:51,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 18:01:51,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 18:01:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:01:51,087 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:51,352 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-12-21 18:01:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:01:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 18:01:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:51,353 INFO L225 Difference]: With dead ends: 52 [2021-12-21 18:01:51,353 INFO L226 Difference]: Without dead ends: 49 [2021-12-21 18:01:51,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 18:01:51,354 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:51,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 168 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-21 18:01:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-21 18:01:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-12-21 18:01:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-21 18:01:51,355 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2021-12-21 18:01:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:51,355 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-21 18:01:51,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-21 18:01:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:01:51,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:51,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:51,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:51,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:51,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1831987682, now seen corresponding path program 1 times [2021-12-21 18:01:51,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:51,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561742876] [2021-12-21 18:01:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:51,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:51,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:51,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561742876] [2021-12-21 18:01:51,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561742876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:51,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620665396] [2021-12-21 18:01:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:51,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:51,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:51,713 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) [2021-12-21 18:01:51,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:01:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 18:01:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:51,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:51,941 INFO L353 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-21 18:01:51,942 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:01:51,987 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-21 18:01:51,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-21 18:01:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:52,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:52,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:01:52,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:01:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:52,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620665396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:52,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:52,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2021-12-21 18:01:52,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823786503] [2021-12-21 18:01:52,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:52,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 18:01:52,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 18:01:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:01:52,180 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:52,388 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-12-21 18:01:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:01:52,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 18:01:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:52,389 INFO L225 Difference]: With dead ends: 50 [2021-12-21 18:01:52,389 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 18:01:52,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:01:52,390 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:52,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 105 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-12-21 18:01:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 18:01:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-21 18:01:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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) [2021-12-21 18:01:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-21 18:01:52,392 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2021-12-21 18:01:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-21 18:01:52,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-21 18:01:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 18:01:52,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:52,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:52,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 18:01:52,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:52,595 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash -938115935, now seen corresponding path program 2 times [2021-12-21 18:01:52,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:52,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505345313] [2021-12-21 18:01:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:52,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:52,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505345313] [2021-12-21 18:01:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505345313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362147941] [2021-12-21 18:01:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:52,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:52,717 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) [2021-12-21 18:01:52,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:01:52,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:01:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:52,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:53,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:01:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362147941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:53,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:53,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-21 18:01:53,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038388506] [2021-12-21 18:01:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:53,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:01:53,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:01:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:01:53,138 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:53,268 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-12-21 18:01:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:01:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 18:01:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:53,269 INFO L225 Difference]: With dead ends: 51 [2021-12-21 18:01:53,269 INFO L226 Difference]: Without dead ends: 51 [2021-12-21 18:01:53,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:01:53,270 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:53,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 110 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-21 18:01:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-12-21 18:01:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-21 18:01:53,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2021-12-21 18:01:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:53,271 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-21 18:01:53,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-21 18:01:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:01:53,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:53,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:53,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:53,472 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 [2021-12-21 18:01:53,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2021-12-21 18:01:53,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:53,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120263298] [2021-12-21 18:01:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:53,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:53,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120263298] [2021-12-21 18:01:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120263298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124691369] [2021-12-21 18:01:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:01:53,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:53,567 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) [2021-12-21 18:01:53,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:01:53,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 18:01:53,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:53,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 18:01:53,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:53,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:53,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:53,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:01:53,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:01:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:53,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124691369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:53,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:53,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-12-21 18:01:53,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719970844] [2021-12-21 18:01:53,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:53,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 18:01:53,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 18:01:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:01:53,995 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:54,283 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-12-21 18:01:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:01:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-21 18:01:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:54,284 INFO L225 Difference]: With dead ends: 92 [2021-12-21 18:01:54,284 INFO L226 Difference]: Without dead ends: 79 [2021-12-21 18:01:54,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 18:01:54,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 205 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:54,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 184 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 225 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-12-21 18:01:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-21 18:01:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-12-21 18:01:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-21 18:01:54,287 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 31 [2021-12-21 18:01:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-21 18:01:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-21 18:01:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:01:54,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:54,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:54,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 18:01:54,499 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 [2021-12-21 18:01:54,499 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1481717885, now seen corresponding path program 3 times [2021-12-21 18:01:54,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740642213] [2021-12-21 18:01:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:54,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:54,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740642213] [2021-12-21 18:01:54,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740642213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26996862] [2021-12-21 18:01:54,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:01:54,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:54,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:54,638 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) [2021-12-21 18:01:54,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:01:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 18:01:54,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 18:01:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:54,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:54,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 18:01:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:55,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-21 18:01:55,197 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 18:01:55,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 43 [2021-12-21 18:01:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:55,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26996862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:55,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:55,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 27 [2021-12-21 18:01:55,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906242806] [2021-12-21 18:01:55,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:55,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 18:01:55,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 18:01:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-12-21 18:01:55,336 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:55,673 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-12-21 18:01:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:01:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-21 18:01:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:55,674 INFO L225 Difference]: With dead ends: 66 [2021-12-21 18:01:55,674 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 18:01:55,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 18:01:55,674 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:55,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 190 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 18:01:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-21 18:01:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 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) [2021-12-21 18:01:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-21 18:01:55,676 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-12-21 18:01:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:55,676 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-21 18:01:55,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-21 18:01:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:01:55,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:55,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:55,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 18:01:55,877 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 [2021-12-21 18:01:55,877 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2021-12-21 18:01:55,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179926151] [2021-12-21 18:01:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:55,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:55,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179926151] [2021-12-21 18:01:55,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179926151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61174085] [2021-12-21 18:01:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:01:55,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:55,982 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) [2021-12-21 18:01:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:01:56,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:01:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:56,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 18:01:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:56,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:56,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:01:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:56,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61174085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:56,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:56,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2021-12-21 18:01:56,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448701767] [2021-12-21 18:01:56,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:56,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 18:01:56,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:56,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 18:01:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:01:56,387 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:56,603 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-21 18:01:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:01:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-21 18:01:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:56,604 INFO L225 Difference]: With dead ends: 55 [2021-12-21 18:01:56,604 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 18:01:56,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:01:56,605 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 298 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:56,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 151 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 18:01:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-12-21 18:01:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-21 18:01:56,606 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2021-12-21 18:01:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:56,606 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-21 18:01:56,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-21 18:01:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 18:01:56,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:56,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:56,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:56,815 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,SelfDestructingSolverStorable16 [2021-12-21 18:01:56,815 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2021-12-21 18:01:56,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:56,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255145287] [2021-12-21 18:01:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:56,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:56,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255145287] [2021-12-21 18:01:56,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255145287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202912875] [2021-12-21 18:01:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:01:56,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:56,968 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) [2021-12-21 18:01:56,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:01:57,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-21 18:01:57,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 18:01:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:57,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:57,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:01:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:57,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:57,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:01:57,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:01:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:57,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202912875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:57,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:57,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2021-12-21 18:01:57,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062623083] [2021-12-21 18:01:57,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:57,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 18:01:57,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 18:01:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:01:57,492 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2021-12-21 18:01:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:57,915 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-12-21 18:01:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:01:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) Word has length 40 [2021-12-21 18:01:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:57,916 INFO L225 Difference]: With dead ends: 90 [2021-12-21 18:01:57,916 INFO L226 Difference]: Without dead ends: 56 [2021-12-21 18:01:57,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 18:01:57,917 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:57,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 285 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:01:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-21 18:01:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-12-21 18:01:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-12-21 18:01:57,919 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2021-12-21 18:01:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:57,919 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-12-21 18:01:57,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2021-12-21 18:01:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-12-21 18:01:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 18:01:57,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:57,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:57,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:58,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 18:01:58,131 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2021-12-21 18:01:58,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:58,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307409023] [2021-12-21 18:01:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:58,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:58,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307409023] [2021-12-21 18:01:58,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307409023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411888822] [2021-12-21 18:01:58,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:01:58,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:58,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:58,233 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) [2021-12-21 18:01:58,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:01:58,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 18:01:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 18:01:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:58,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:58,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-21 18:01:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:58,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411888822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:58,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:58,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2021-12-21 18:01:58,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879753185] [2021-12-21 18:01:58,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:58,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 18:01:58,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 18:01:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:01:58,690 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:59,006 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-12-21 18:01:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:01:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 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 44 [2021-12-21 18:01:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:59,007 INFO L225 Difference]: With dead ends: 66 [2021-12-21 18:01:59,007 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 18:01:59,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 18:01:59,008 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 426 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:59,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 192 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:01:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 18:01:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-21 18:01:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-21 18:01:59,010 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2021-12-21 18:01:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:59,010 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-21 18:01:59,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-21 18:01:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:01:59,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:59,011 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:59,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:59,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:59,217 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:01:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2021-12-21 18:01:59,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:59,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798575541] [2021-12-21 18:01:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:59,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:59,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798575541] [2021-12-21 18:01:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798575541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306079685] [2021-12-21 18:01:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:01:59,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:59,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:59,462 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) [2021-12-21 18:01:59,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:01:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 18:01:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:59,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:59,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:01:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:59,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:59,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:01:59,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:01:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:59,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306079685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:59,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:59,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2021-12-21 18:01:59,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448278453] [2021-12-21 18:01:59,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:59,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 18:01:59,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 18:01:59,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:01:59,964 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:00,448 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-12-21 18:02:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:02:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2021-12-21 18:02:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:00,449 INFO L225 Difference]: With dead ends: 100 [2021-12-21 18:02:00,449 INFO L226 Difference]: Without dead ends: 67 [2021-12-21 18:02:00,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 18:02:00,450 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:00,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 436 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 606 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2021-12-21 18:02:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-21 18:02:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-21 18:02:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-12-21 18:02:00,452 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2021-12-21 18:02:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:00,452 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-12-21 18:02:00,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-12-21 18:02:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 18:02:00,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:00,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:00,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:00,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:00,671 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 999955645, now seen corresponding path program 8 times [2021-12-21 18:02:00,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310775391] [2021-12-21 18:02:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:00,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:00,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:00,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310775391] [2021-12-21 18:02:00,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310775391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:00,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299689920] [2021-12-21 18:02:00,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:00,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:00,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:00,876 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) [2021-12-21 18:02:00,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:02:00,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:00,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:00,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 18:02:00,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:01,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:01,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:02:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:01,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299689920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:01,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:01,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-12-21 18:02:01,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105282532] [2021-12-21 18:02:01,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:01,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 18:02:01,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:01,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 18:02:01,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:02:01,425 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:01,679 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-12-21 18:02:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:02:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2021-12-21 18:02:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:01,680 INFO L225 Difference]: With dead ends: 77 [2021-12-21 18:02:01,680 INFO L226 Difference]: Without dead ends: 77 [2021-12-21 18:02:01,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 18:02:01,682 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 379 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:01,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 322 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:02:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-21 18:02:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-12-21 18:02:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-12-21 18:02:01,686 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 53 [2021-12-21 18:02:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:01,686 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-12-21 18:02:01,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-12-21 18:02:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 18:02:01,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:01,687 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:01,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:01,899 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,SelfDestructingSolverStorable20 [2021-12-21 18:02:01,899 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 9 times [2021-12-21 18:02:01,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:01,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743885081] [2021-12-21 18:02:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:01,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:02,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:02,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743885081] [2021-12-21 18:02:02,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743885081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:02,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116447642] [2021-12-21 18:02:02,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:02,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:02,184 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) [2021-12-21 18:02:02,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:02:02,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-21 18:02:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 18:02:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:02,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:02:02,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:02,981 INFO L353 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2021-12-21 18:02:02,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-12-21 18:02:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 18:02:03,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:03,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-21 18:02:03,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-21 18:02:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 18:02:03,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116447642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:03,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:03,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 32 [2021-12-21 18:02:03,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057155852] [2021-12-21 18:02:03,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:03,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 18:02:03,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 18:02:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:02:03,598 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 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) [2021-12-21 18:02:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:04,529 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2021-12-21 18:02:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 18:02:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 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 58 [2021-12-21 18:02:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:04,531 INFO L225 Difference]: With dead ends: 144 [2021-12-21 18:02:04,531 INFO L226 Difference]: Without dead ends: 141 [2021-12-21 18:02:04,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=346, Invalid=3944, Unknown=0, NotChecked=0, Total=4290 [2021-12-21 18:02:04,533 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:04,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 422 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 345 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2021-12-21 18:02:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-21 18:02:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2021-12-21 18:02:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2021-12-21 18:02:04,538 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2021-12-21 18:02:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:04,538 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2021-12-21 18:02:04,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 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) [2021-12-21 18:02:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2021-12-21 18:02:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 18:02:04,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:04,539 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:04,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:04,756 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,SelfDestructingSolverStorable21 [2021-12-21 18:02:04,756 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:04,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1191879466, now seen corresponding path program 4 times [2021-12-21 18:02:04,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:04,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152736165] [2021-12-21 18:02:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:04,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:04,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:05,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152736165] [2021-12-21 18:02:05,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152736165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:05,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075122676] [2021-12-21 18:02:05,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:02:05,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:05,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:05,001 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) [2021-12-21 18:02:05,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:02:05,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:02:05,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 18:02:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:05,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:05,405 INFO L353 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-21 18:02:05,406 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:05,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:05,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:05,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:05,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075122676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:05,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:05,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2021-12-21 18:02:05,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401452030] [2021-12-21 18:02:05,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 18:02:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 18:02:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:02:05,742 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:06,400 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2021-12-21 18:02:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 18:02:06,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 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 60 [2021-12-21 18:02:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:06,401 INFO L225 Difference]: With dead ends: 162 [2021-12-21 18:02:06,401 INFO L226 Difference]: Without dead ends: 103 [2021-12-21 18:02:06,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 18:02:06,402 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:06,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 576 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 775 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-12-21 18:02:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-21 18:02:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-21 18:02:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 99 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-12-21 18:02:06,405 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 60 [2021-12-21 18:02:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:06,405 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-12-21 18:02:06,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-12-21 18:02:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 18:02:06,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:06,406 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:06,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:06,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:06,626 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1846000595, now seen corresponding path program 5 times [2021-12-21 18:02:06,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455981345] [2021-12-21 18:02:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:06,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:06,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455981345] [2021-12-21 18:02:06,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455981345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893911419] [2021-12-21 18:02:06,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:02:06,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:06,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:06,895 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) [2021-12-21 18:02:06,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:02:07,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-21 18:02:07,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-21 18:02:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:07,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:02:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:07,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:08,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893911419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:08,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:08,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 19] total 49 [2021-12-21 18:02:08,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114030498] [2021-12-21 18:02:08,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-21 18:02:08,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-21 18:02:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-12-21 18:02:08,666 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:09,860 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2021-12-21 18:02:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 18:02:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 18:02:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:09,867 INFO L225 Difference]: With dead ends: 311 [2021-12-21 18:02:09,867 INFO L226 Difference]: Without dead ends: 311 [2021-12-21 18:02:09,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2021-12-21 18:02:09,869 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1101 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:09,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1101 Valid, 767 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:02:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-21 18:02:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 202. [2021-12-21 18:02:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.154228855721393) internal successors, (232), 201 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 232 transitions. [2021-12-21 18:02:09,888 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 232 transitions. Word has length 64 [2021-12-21 18:02:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:09,888 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 232 transitions. [2021-12-21 18:02:09,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 232 transitions. [2021-12-21 18:02:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 18:02:09,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:09,889 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:09,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:10,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:10,106 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1045878647, now seen corresponding path program 6 times [2021-12-21 18:02:10,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:10,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997990629] [2021-12-21 18:02:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:10,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:10,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997990629] [2021-12-21 18:02:10,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997990629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242635089] [2021-12-21 18:02:10,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:02:10,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:10,438 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) [2021-12-21 18:02:10,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:02:10,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-21 18:02:10,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:10,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-21 18:02:10,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:10,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:10,822 INFO L353 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-21 18:02:10,822 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:10,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:10,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:10,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:10,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:11,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242635089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:11,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:11,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 37 [2021-12-21 18:02:11,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544437562] [2021-12-21 18:02:11,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:11,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 18:02:11,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 18:02:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:02:11,127 INFO L87 Difference]: Start difference. First operand 202 states and 232 transitions. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:11,711 INFO L93 Difference]: Finished difference Result 193 states and 217 transitions. [2021-12-21 18:02:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 18:02:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 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 69 [2021-12-21 18:02:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:11,713 INFO L225 Difference]: With dead ends: 193 [2021-12-21 18:02:11,713 INFO L226 Difference]: Without dead ends: 119 [2021-12-21 18:02:11,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=2598, Unknown=0, NotChecked=0, Total=2862 [2021-12-21 18:02:11,713 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 220 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:11,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 787 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1100 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2021-12-21 18:02:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-21 18:02:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-12-21 18:02:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-12-21 18:02:11,715 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 69 [2021-12-21 18:02:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:11,715 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-12-21 18:02:11,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-12-21 18:02:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 18:02:11,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:11,716 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:11,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-21 18:02:11,916 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,SelfDestructingSolverStorable24 [2021-12-21 18:02:11,917 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash -83187244, now seen corresponding path program 7 times [2021-12-21 18:02:11,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:11,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889583534] [2021-12-21 18:02:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:11,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:12,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:12,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889583534] [2021-12-21 18:02:12,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889583534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493797444] [2021-12-21 18:02:12,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:02:12,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:12,156 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) [2021-12-21 18:02:12,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 18:02:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:12,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-21 18:02:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:12,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:12,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:02:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:12,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493797444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:12,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:12,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2021-12-21 18:02:12,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770746319] [2021-12-21 18:02:12,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:12,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 18:02:12,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 18:02:12,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 18:02:12,900 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:13,437 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2021-12-21 18:02:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:02:13,438 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-21 18:02:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:13,438 INFO L225 Difference]: With dead ends: 140 [2021-12-21 18:02:13,438 INFO L226 Difference]: Without dead ends: 140 [2021-12-21 18:02:13,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1985, Unknown=0, NotChecked=0, Total=2450 [2021-12-21 18:02:13,439 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 490 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:13,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 578 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:02:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-21 18:02:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-12-21 18:02:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-12-21 18:02:13,441 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 73 [2021-12-21 18:02:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:13,441 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-12-21 18:02:13,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-12-21 18:02:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 18:02:13,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:13,442 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:13,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:13,651 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,SelfDestructingSolverStorable25 [2021-12-21 18:02:13,651 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash 653582896, now seen corresponding path program 8 times [2021-12-21 18:02:13,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:13,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999485713] [2021-12-21 18:02:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:13,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:14,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999485713] [2021-12-21 18:02:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999485713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93344698] [2021-12-21 18:02:14,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:14,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:14,036 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) [2021-12-21 18:02:14,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 18:02:14,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-21 18:02:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:14,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:02:14,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:02:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:15,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:15,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-21 18:02:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:16,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:16,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:16,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:17,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93344698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:17,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:17,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 66 [2021-12-21 18:02:17,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134190484] [2021-12-21 18:02:17,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:17,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-21 18:02:17,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-21 18:02:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3981, Unknown=0, NotChecked=0, Total=4290 [2021-12-21 18:02:17,862 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:18,977 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2021-12-21 18:02:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 18:02:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-21 18:02:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:18,979 INFO L225 Difference]: With dead ends: 260 [2021-12-21 18:02:18,979 INFO L226 Difference]: Without dead ends: 254 [2021-12-21 18:02:18,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2021-12-21 18:02:18,980 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 250 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:18,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1089 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 715 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2021-12-21 18:02:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-21 18:02:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 200. [2021-12-21 18:02:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.150753768844221) internal successors, (229), 199 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2021-12-21 18:02:18,991 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 78 [2021-12-21 18:02:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:18,992 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2021-12-21 18:02:18,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2021-12-21 18:02:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 18:02:18,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:18,993 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:19,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:19,207 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,SelfDestructingSolverStorable26 [2021-12-21 18:02:19,207 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1524452150, now seen corresponding path program 9 times [2021-12-21 18:02:19,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:19,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575647965] [2021-12-21 18:02:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:19,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:19,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:19,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575647965] [2021-12-21 18:02:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575647965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522740137] [2021-12-21 18:02:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:19,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:19,411 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) [2021-12-21 18:02:19,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 18:02:19,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-21 18:02:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-21 18:02:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:19,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:19,794 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-21 18:02:19,794 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-21 18:02:19,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:19,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:19,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:19,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522740137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:20,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:20,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2021-12-21 18:02:20,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303361893] [2021-12-21 18:02:20,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:20,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 18:02:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 18:02:20,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 18:02:20,163 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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) [2021-12-21 18:02:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:20,702 INFO L93 Difference]: Finished difference Result 320 states and 364 transitions. [2021-12-21 18:02:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 18:02:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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 78 [2021-12-21 18:02:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:20,703 INFO L225 Difference]: With dead ends: 320 [2021-12-21 18:02:20,704 INFO L226 Difference]: Without dead ends: 250 [2021-12-21 18:02:20,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=2817, Unknown=0, NotChecked=0, Total=3080 [2021-12-21 18:02:20,705 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:20,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 894 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1172 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2021-12-21 18:02:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-21 18:02:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 200. [2021-12-21 18:02:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1457286432160805) internal successors, (228), 199 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2021-12-21 18:02:20,708 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 78 [2021-12-21 18:02:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:20,709 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2021-12-21 18:02:20,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 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) [2021-12-21 18:02:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2021-12-21 18:02:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 18:02:20,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:20,710 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:20,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:20,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:20,925 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1677653747, now seen corresponding path program 10 times [2021-12-21 18:02:20,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:20,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189007841] [2021-12-21 18:02:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:20,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:21,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:21,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189007841] [2021-12-21 18:02:21,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189007841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:21,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446352998] [2021-12-21 18:02:21,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:02:21,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:21,296 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) [2021-12-21 18:02:21,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 18:02:21,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:02:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-21 18:02:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:21,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:21,699 INFO L353 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-21 18:02:21,700 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:21,737 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-21 18:02:21,737 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-21 18:02:21,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:21,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:21,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:21,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:22,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446352998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:22,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:22,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2021-12-21 18:02:22,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528211150] [2021-12-21 18:02:22,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:22,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 18:02:22,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 18:02:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 18:02:22,115 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:22,897 INFO L93 Difference]: Finished difference Result 248 states and 280 transitions. [2021-12-21 18:02:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-21 18:02:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-21 18:02:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:22,898 INFO L225 Difference]: With dead ends: 248 [2021-12-21 18:02:22,898 INFO L226 Difference]: Without dead ends: 165 [2021-12-21 18:02:22,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=3429, Unknown=0, NotChecked=0, Total=3782 [2021-12-21 18:02:22,903 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 459 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:22,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 831 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:02:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-21 18:02:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2021-12-21 18:02:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 161 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2021-12-21 18:02:22,909 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 80 [2021-12-21 18:02:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:22,909 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2021-12-21 18:02:22,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2021-12-21 18:02:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 18:02:22,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:22,910 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:22,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-21 18:02:23,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 18:02:23,118 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2135505677, now seen corresponding path program 11 times [2021-12-21 18:02:23,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:23,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106658372] [2021-12-21 18:02:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:23,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:23,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:23,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106658372] [2021-12-21 18:02:23,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106658372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:23,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121638972] [2021-12-21 18:02:23,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:02:23,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:23,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:23,408 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) [2021-12-21 18:02:23,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 18:02:23,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-21 18:02:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-21 18:02:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:23,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:02:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:24,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 120 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:25,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121638972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:25,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:25,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2021-12-21 18:02:25,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789444998] [2021-12-21 18:02:25,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:25,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-21 18:02:25,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-21 18:02:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 18:02:25,061 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:25,684 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2021-12-21 18:02:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:02:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 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 82 [2021-12-21 18:02:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:25,685 INFO L225 Difference]: With dead ends: 188 [2021-12-21 18:02:25,685 INFO L226 Difference]: Without dead ends: 188 [2021-12-21 18:02:25,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=832, Invalid=3860, Unknown=0, NotChecked=0, Total=4692 [2021-12-21 18:02:25,686 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 686 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:25,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 749 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:02:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-21 18:02:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2021-12-21 18:02:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.132867132867133) internal successors, (162), 143 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2021-12-21 18:02:25,689 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 82 [2021-12-21 18:02:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:25,689 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2021-12-21 18:02:25,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2021-12-21 18:02:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 18:02:25,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:25,690 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:25,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:25,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:25,907 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1292013839, now seen corresponding path program 12 times [2021-12-21 18:02:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97229538] [2021-12-21 18:02:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:25,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:26,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97229538] [2021-12-21 18:02:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97229538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572822506] [2021-12-21 18:02:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:02:26,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:26,275 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) [2021-12-21 18:02:26,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 18:02:26,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-21 18:02:26,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:26,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-21 18:02:26,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:26,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:26,820 INFO L353 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-21 18:02:26,820 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:26,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:26,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:27,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:27,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:27,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572822506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:27,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:27,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2021-12-21 18:02:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89882523] [2021-12-21 18:02:27,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-21 18:02:27,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-21 18:02:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 18:02:27,378 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:28,382 INFO L93 Difference]: Finished difference Result 249 states and 281 transitions. [2021-12-21 18:02:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-21 18:02:28,382 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 states have internal predecessors, (144), 0 states have call successors, (0), 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 87 [2021-12-21 18:02:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:28,383 INFO L225 Difference]: With dead ends: 249 [2021-12-21 18:02:28,383 INFO L226 Difference]: Without dead ends: 151 [2021-12-21 18:02:28,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 148 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=298, Invalid=3484, Unknown=0, NotChecked=0, Total=3782 [2021-12-21 18:02:28,383 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:28,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1104 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1459 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2021-12-21 18:02:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-21 18:02:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-12-21 18:02:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.129251700680272) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2021-12-21 18:02:28,386 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 87 [2021-12-21 18:02:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2021-12-21 18:02:28,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2021-12-21 18:02:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 18:02:28,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:28,386 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:28,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:28,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:28,595 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1141261326, now seen corresponding path program 13 times [2021-12-21 18:02:28,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:28,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437146387] [2021-12-21 18:02:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:28,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:28,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:28,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437146387] [2021-12-21 18:02:28,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437146387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:28,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592502891] [2021-12-21 18:02:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:02:28,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:28,912 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) [2021-12-21 18:02:28,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 18:02:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 18:02:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:29,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:29,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:02:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:29,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592502891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:29,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:29,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-12-21 18:02:29,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623606708] [2021-12-21 18:02:29,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:29,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-21 18:02:29,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-21 18:02:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 18:02:29,839 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:30,514 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2021-12-21 18:02:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 18:02:30,515 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-21 18:02:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:30,516 INFO L225 Difference]: With dead ends: 172 [2021-12-21 18:02:30,516 INFO L226 Difference]: Without dead ends: 172 [2021-12-21 18:02:30,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=660, Invalid=2880, Unknown=0, NotChecked=0, Total=3540 [2021-12-21 18:02:30,516 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 491 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:30,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 816 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:02:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-21 18:02:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-12-21 18:02:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2021-12-21 18:02:30,518 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 91 [2021-12-21 18:02:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:30,518 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2021-12-21 18:02:30,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2021-12-21 18:02:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 18:02:30,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:30,519 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:30,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:30,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:30,719 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1881316406, now seen corresponding path program 14 times [2021-12-21 18:02:30,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709910433] [2021-12-21 18:02:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:30,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:31,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709910433] [2021-12-21 18:02:31,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709910433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109392086] [2021-12-21 18:02:31,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:31,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:31,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:31,125 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) [2021-12-21 18:02:31,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 18:02:31,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:31,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-21 18:02:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:31,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:02:31,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:32,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:32,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-21 18:02:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:33,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:33,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:33,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:33,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-21 18:02:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:34,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109392086] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:34,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:34,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2021-12-21 18:02:34,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225171438] [2021-12-21 18:02:34,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:34,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-21 18:02:34,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-21 18:02:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2021-12-21 18:02:34,062 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:35,717 INFO L93 Difference]: Finished difference Result 326 states and 371 transitions. [2021-12-21 18:02:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-21 18:02:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 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 96 [2021-12-21 18:02:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:35,719 INFO L225 Difference]: With dead ends: 326 [2021-12-21 18:02:35,719 INFO L226 Difference]: Without dead ends: 320 [2021-12-21 18:02:35,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 175 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=551, Invalid=6255, Unknown=0, NotChecked=0, Total=6806 [2021-12-21 18:02:35,720 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 273 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:35,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1577 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1055 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2021-12-21 18:02:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-21 18:02:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 252. [2021-12-21 18:02:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.151394422310757) internal successors, (289), 251 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 289 transitions. [2021-12-21 18:02:35,727 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 289 transitions. Word has length 96 [2021-12-21 18:02:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:35,730 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 289 transitions. [2021-12-21 18:02:35,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 289 transitions. [2021-12-21 18:02:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 18:02:35,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:35,732 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:35,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:35,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:35,950 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:35,951 INFO L85 PathProgramCache]: Analyzing trace with hash 105215568, now seen corresponding path program 15 times [2021-12-21 18:02:35,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:35,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982517625] [2021-12-21 18:02:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:35,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:36,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982517625] [2021-12-21 18:02:36,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982517625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391665982] [2021-12-21 18:02:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:36,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:36,362 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) [2021-12-21 18:02:36,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 18:02:36,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 18:02:36,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-21 18:02:36,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:36,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:37,016 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-21 18:02:37,016 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-21 18:02:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:37,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:37,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:37,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:37,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391665982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:37,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:37,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2021-12-21 18:02:37,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140214615] [2021-12-21 18:02:37,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:37,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-21 18:02:37,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-21 18:02:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 18:02:37,569 INFO L87 Difference]: Start difference. First operand 252 states and 289 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:38,796 INFO L93 Difference]: Finished difference Result 310 states and 353 transitions. [2021-12-21 18:02:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 18:02:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-21 18:02:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:38,797 INFO L225 Difference]: With dead ends: 310 [2021-12-21 18:02:38,797 INFO L226 Difference]: Without dead ends: 207 [2021-12-21 18:02:38,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=4231, Unknown=0, NotChecked=0, Total=4556 [2021-12-21 18:02:38,798 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:38,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 1380 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1913 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2021-12-21 18:02:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-21 18:02:38,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2021-12-21 18:02:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 203 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2021-12-21 18:02:38,801 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 96 [2021-12-21 18:02:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:38,801 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2021-12-21 18:02:38,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2021-12-21 18:02:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 18:02:38,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:38,801 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:38,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:39,011 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,SelfDestructingSolverStorable33 [2021-12-21 18:02:39,012 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash -441577005, now seen corresponding path program 16 times [2021-12-21 18:02:39,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365405882] [2021-12-21 18:02:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:39,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 120 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:39,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365405882] [2021-12-21 18:02:39,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365405882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817523205] [2021-12-21 18:02:39,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:02:39,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:39,339 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) [2021-12-21 18:02:39,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-21 18:02:39,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:02:39,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-21 18:02:39,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:40,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:40,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:02:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:40,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817523205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:40,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:40,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 50 [2021-12-21 18:02:40,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419254829] [2021-12-21 18:02:40,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:40,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-21 18:02:40,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-21 18:02:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 18:02:40,684 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:41,755 INFO L93 Difference]: Finished difference Result 230 states and 262 transitions. [2021-12-21 18:02:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 18:02:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 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 100 [2021-12-21 18:02:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:41,756 INFO L225 Difference]: With dead ends: 230 [2021-12-21 18:02:41,756 INFO L226 Difference]: Without dead ends: 230 [2021-12-21 18:02:41,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=968, Invalid=4288, Unknown=0, NotChecked=0, Total=5256 [2021-12-21 18:02:41,757 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 867 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:41,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 963 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 18:02:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-21 18:02:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 176. [2021-12-21 18:02:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1314285714285715) internal successors, (198), 175 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2021-12-21 18:02:41,759 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 100 [2021-12-21 18:02:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:41,759 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2021-12-21 18:02:41,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2021-12-21 18:02:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 18:02:41,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:41,760 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:41,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-21 18:02:41,963 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,SelfDestructingSolverStorable34 [2021-12-21 18:02:41,963 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -997573781, now seen corresponding path program 17 times [2021-12-21 18:02:41,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933695092] [2021-12-21 18:02:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:41,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:42,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933695092] [2021-12-21 18:02:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933695092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48125895] [2021-12-21 18:02:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:02:42,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:42,380 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) [2021-12-21 18:02:42,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-21 18:02:42,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-21 18:02:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:42,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-21 18:02:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:42,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:43,061 INFO L353 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-21 18:02:43,062 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 18:02:43,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:43,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:43,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:43,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:43,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48125895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:43,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:43,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2021-12-21 18:02:43,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705375772] [2021-12-21 18:02:43,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:43,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-21 18:02:43,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-21 18:02:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 18:02:43,415 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:44,638 INFO L93 Difference]: Finished difference Result 356 states and 403 transitions. [2021-12-21 18:02:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-21 18:02:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 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 105 [2021-12-21 18:02:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:44,647 INFO L225 Difference]: With dead ends: 356 [2021-12-21 18:02:44,647 INFO L226 Difference]: Without dead ends: 183 [2021-12-21 18:02:44,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 187 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2021-12-21 18:02:44,648 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 589 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:44,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 1638 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 18:02:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-21 18:02:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2021-12-21 18:02:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1284916201117319) internal successors, (202), 179 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) [2021-12-21 18:02:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-12-21 18:02:44,665 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 105 [2021-12-21 18:02:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:44,665 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-12-21 18:02:44,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-12-21 18:02:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 18:02:44,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:44,666 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:44,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:44,866 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,SelfDestructingSolverStorable35 [2021-12-21 18:02:44,867 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash 859104072, now seen corresponding path program 18 times [2021-12-21 18:02:44,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:44,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770287369] [2021-12-21 18:02:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:44,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:45,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:45,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770287369] [2021-12-21 18:02:45,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770287369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:45,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205976811] [2021-12-21 18:02:45,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:02:45,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:45,269 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) [2021-12-21 18:02:45,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-21 18:02:45,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-21 18:02:45,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:45,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 18:02:45,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:46,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:46,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-21 18:02:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:47,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205976811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:47,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:47,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 66 [2021-12-21 18:02:47,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303954277] [2021-12-21 18:02:47,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:47,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-21 18:02:47,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-21 18:02:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=3758, Unknown=0, NotChecked=0, Total=4422 [2021-12-21 18:02:47,036 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:47,887 INFO L93 Difference]: Finished difference Result 204 states and 230 transitions. [2021-12-21 18:02:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 18:02:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 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 109 [2021-12-21 18:02:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:47,888 INFO L225 Difference]: With dead ends: 204 [2021-12-21 18:02:47,888 INFO L226 Difference]: Without dead ends: 204 [2021-12-21 18:02:47,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1271, Invalid=5209, Unknown=0, NotChecked=0, Total=6480 [2021-12-21 18:02:47,889 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1282 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:47,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 752 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:02:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-21 18:02:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-12-21 18:02:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.130890052356021) internal successors, (216), 191 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 216 transitions. [2021-12-21 18:02:47,892 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 216 transitions. Word has length 109 [2021-12-21 18:02:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:47,892 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 216 transitions. [2021-12-21 18:02:47,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 216 transitions. [2021-12-21 18:02:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 18:02:47,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:47,893 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:47,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:48,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:48,103 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2093452996, now seen corresponding path program 19 times [2021-12-21 18:02:48,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:48,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707046012] [2021-12-21 18:02:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:48,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:48,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707046012] [2021-12-21 18:02:48,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707046012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780040151] [2021-12-21 18:02:48,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:02:48,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:48,676 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) [2021-12-21 18:02:48,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-21 18:02:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-21 18:02:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:49,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:49,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 18:02:50,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:02:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:50,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:50,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-21 18:02:50,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-21 18:02:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:51,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780040151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:51,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:51,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2021-12-21 18:02:51,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950377603] [2021-12-21 18:02:51,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:51,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-21 18:02:51,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-21 18:02:51,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5183, Unknown=0, NotChecked=0, Total=5402 [2021-12-21 18:02:51,717 INFO L87 Difference]: Start difference. First operand 192 states and 216 transitions. Second operand has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:54,257 INFO L93 Difference]: Finished difference Result 333 states and 377 transitions. [2021-12-21 18:02:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-21 18:02:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 states have internal predecessors, (270), 0 states have call successors, (0), 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 114 [2021-12-21 18:02:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:54,259 INFO L225 Difference]: With dead ends: 333 [2021-12-21 18:02:54,259 INFO L226 Difference]: Without dead ends: 199 [2021-12-21 18:02:54,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=491, Invalid=9609, Unknown=0, NotChecked=0, Total=10100 [2021-12-21 18:02:54,260 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 586 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:54,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 2504 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3424 Invalid, 0 Unknown, 81 Unchecked, 1.4s Time] [2021-12-21 18:02:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-21 18:02:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-12-21 18:02:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 195 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2021-12-21 18:02:54,263 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 114 [2021-12-21 18:02:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:54,263 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2021-12-21 18:02:54,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2021-12-21 18:02:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 18:02:54,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:54,264 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:54,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:54,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-21 18:02:54,471 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-21 18:02:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720833, now seen corresponding path program 20 times [2021-12-21 18:02:54,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870799350] [2021-12-21 18:02:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:54,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:54,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870799350] [2021-12-21 18:02:54,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870799350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973234703] [2021-12-21 18:02:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:54,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:54,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:54,955 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:02:54,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-21 18:02:55,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 18:02:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:55,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:56,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 18:02:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:56,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973234703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:56,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:56,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 58 [2021-12-21 18:02:56,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026116256] [2021-12-21 18:02:56,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:56,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-21 18:02:56,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-21 18:02:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3070, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 18:02:56,792 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)