./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-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 e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:56:17,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:56:17,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:56:17,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:56:17,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:56:17,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:56:17,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:56:17,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:56:17,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:56:17,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:56:17,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:56:17,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:56:17,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:56:17,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:56:17,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:56:17,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:56:17,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:56:17,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:56:17,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:56:17,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:56:17,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:56:17,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:56:17,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:56:17,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:56:17,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:56:17,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:56:17,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:56:17,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:56:17,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:56:17,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:56:17,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:56:17,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:56:17,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:56:17,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:56:17,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:56:17,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:56:17,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:56:17,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:56:17,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:56:17,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:56:17,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:56:17,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:56:17,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:56:17,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:56:17,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:56:17,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:56:17,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:56:17,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:56:17,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:56:17,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:56:17,823 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:56:17,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:56:17,823 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:56:17,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:56:17,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:56:17,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:56:17,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:56:17,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:56:17,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:56:17,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:56:17,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:56:17,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:56:17,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:56:17,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:56:17,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:56:17,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:56:17,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2021-12-18 19:56:18,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:56:18,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:56:18,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:56:18,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:56:18,033 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:56:18,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-12-18 19:56:18,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8bfeaf7/38743159700742aebb6677256915f610/FLAGdcc5a89c9 [2021-12-18 19:56:18,481 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:56:18,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-12-18 19:56:18,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8bfeaf7/38743159700742aebb6677256915f610/FLAGdcc5a89c9 [2021-12-18 19:56:18,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8bfeaf7/38743159700742aebb6677256915f610 [2021-12-18 19:56:18,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:56:18,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:56:18,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:56:18,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:56:18,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:56:18,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:56:18" (1/1) ... [2021-12-18 19:56:18,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795f2601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:18, skipping insertion in model container [2021-12-18 19:56:18,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:56:18" (1/1) ... [2021-12-18 19:56:18,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:56:18,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:56:19,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:56:19,142 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:56:19,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:56:19,197 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:56:19,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19 WrapperNode [2021-12-18 19:56:19,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:56:19,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:56:19,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:56:19,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:56:19,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,246 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-18 19:56:19,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:56:19,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:56:19,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:56:19,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:56:19,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:56:19,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:56:19,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:56:19,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:56:19,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (1/1) ... [2021-12-18 19:56:19,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:56:19,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:19,319 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) [2021-12-18 19:56:19,325 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 [2021-12-18 19:56:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:56:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:56:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:56:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:56:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:56:19,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:56:19,408 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:56:19,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:56:19,552 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:56:19,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:56:19,556 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 19:56:19,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:56:19 BoogieIcfgContainer [2021-12-18 19:56:19,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:56:19,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:56:19,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:56:19,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:56:19,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:56:18" (1/3) ... [2021-12-18 19:56:19,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131ff6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:56:19, skipping insertion in model container [2021-12-18 19:56:19,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:56:19" (2/3) ... [2021-12-18 19:56:19,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131ff6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:56:19, skipping insertion in model container [2021-12-18 19:56:19,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:56:19" (3/3) ... [2021-12-18 19:56:19,563 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2021-12-18 19:56:19,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:56:19,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-18 19:56:19,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:56:19,600 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 [2021-12-18 19:56:19,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-18 19:56:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:56:19,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:19,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:19,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 19:56:19,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408542104] [2021-12-18 19:56:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:19,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:19,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:19,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408542104] [2021-12-18 19:56:19,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408542104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:19,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:19,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:56:19,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088636455] [2021-12-18 19:56:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:19,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:19,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:19,814 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:19,879 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-18 19:56:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:56:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:19,888 INFO L225 Difference]: With dead ends: 100 [2021-12-18 19:56:19,888 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:56:19,891 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 [2021-12-18 19:56:19,894 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:19,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:56:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-12-18 19:56:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-18 19:56:19,930 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-12-18 19:56:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:19,931 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-18 19:56:19,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-18 19:56:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:56:19,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:19,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:19,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:56:19,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-18 19:56:19,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820180900] [2021-12-18 19:56:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:19,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820180900] [2021-12-18 19:56:20,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820180900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:56:20,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257276932] [2021-12-18 19:56:20,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:56:20,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:56:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:56:20,008 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,045 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-18 19:56:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:56:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:56:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,047 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:56:20,048 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:56:20,048 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 [2021-12-18 19:56:20,051 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:56:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:56:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-18 19:56:20,065 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-12-18 19:56:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,066 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-18 19:56:20,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-18 19:56:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:56:20,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:56:20,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-18 19:56:20,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615067549] [2021-12-18 19:56:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615067549] [2021-12-18 19:56:20,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615067549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:56:20,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514318309] [2021-12-18 19:56:20,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:20,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:20,163 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,250 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-18 19:56:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:56:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,252 INFO L225 Difference]: With dead ends: 97 [2021-12-18 19:56:20,252 INFO L226 Difference]: Without dead ends: 97 [2021-12-18 19:56:20,253 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 [2021-12-18 19:56:20,258 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-18 19:56:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-12-18 19:56:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-18 19:56:20,268 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-12-18 19:56:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,268 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-18 19:56:20,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-18 19:56:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:56:20,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:56:20,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-18 19:56:20,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771054630] [2021-12-18 19:56:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771054630] [2021-12-18 19:56:20,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771054630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:56:20,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489309208] [2021-12-18 19:56:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:20,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:20,338 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,361 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-18 19:56:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:56:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,362 INFO L225 Difference]: With dead ends: 54 [2021-12-18 19:56:20,363 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:56:20,363 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 [2021-12-18 19:56:20,363 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:56:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-18 19:56:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-18 19:56:20,366 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-12-18 19:56:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,366 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-18 19:56:20,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-18 19:56:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:56:20,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:56:20,367 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-18 19:56:20,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322432788] [2021-12-18 19:56:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322432788] [2021-12-18 19:56:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322432788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:56:20,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046906966] [2021-12-18 19:56:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:20,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:20,424 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,445 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-18 19:56:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:56:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,447 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:56:20,447 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:56:20,447 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 [2021-12-18 19:56:20,448 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:56:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-18 19:56:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-12-18 19:56:20,463 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-12-18 19:56:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,463 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-12-18 19:56:20,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-12-18 19:56:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:56:20,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:56:20,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-18 19:56:20,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589851820] [2021-12-18 19:56:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589851820] [2021-12-18 19:56:20,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589851820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:56:20,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440341448] [2021-12-18 19:56:20,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:56:20,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:56:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:56:20,493 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,511 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-12-18 19:56:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:56:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:56:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,512 INFO L225 Difference]: With dead ends: 63 [2021-12-18 19:56:20,512 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 19:56:20,513 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 [2021-12-18 19:56:20,513 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 19:56:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-18 19:56:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-18 19:56:20,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-12-18 19:56:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,516 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-18 19:56:20,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-18 19:56:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:56:20,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:56:20,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-18 19:56:20,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150388697] [2021-12-18 19:56:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150388697] [2021-12-18 19:56:20,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150388697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:56:20,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565531386] [2021-12-18 19:56:20,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:56:20,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:56:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:56:20,565 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,622 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-12-18 19:56:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:56:20,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:56:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,623 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:56:20,623 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:56:20,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:56:20,624 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:56:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-18 19:56:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 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) [2021-12-18 19:56:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-12-18 19:56:20,626 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-12-18 19:56:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,627 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-12-18 19:56:20,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-12-18 19:56:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:56:20,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:56:20,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-18 19:56:20,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664841629] [2021-12-18 19:56:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664841629] [2021-12-18 19:56:20,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664841629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:20,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:20,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:56:20,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280665712] [2021-12-18 19:56:20,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:20,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:20,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:20,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:20,656 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:20,674 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-12-18 19:56:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:20,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-12-18 19:56:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:20,675 INFO L225 Difference]: With dead ends: 64 [2021-12-18 19:56:20,675 INFO L226 Difference]: Without dead ends: 64 [2021-12-18 19:56:20,675 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 [2021-12-18 19:56:20,676 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:20,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-18 19:56:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-18 19:56:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-12-18 19:56:20,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-12-18 19:56:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-12-18 19:56:20,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-12-18 19:56:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:56:20,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:20,679 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:20,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:56:20,679 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-18 19:56:20,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:20,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636387006] [2021-12-18 19:56:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636387006] [2021-12-18 19:56:20,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636387006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15644254] [2021-12-18 19:56:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:20,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:20,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:20,725 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) [2021-12-18 19:56:20,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:56:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:56:20,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:56:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:56:20,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:56:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:20,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15644254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:21,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:21,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:56:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328974002] [2021-12-18 19:56:21,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:21,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:56:21,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:56:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:56:21,073 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-18 19:56:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:21,214 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-12-18 19:56:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:56:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 11 [2021-12-18 19:56:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:21,215 INFO L225 Difference]: With dead ends: 149 [2021-12-18 19:56:21,215 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 19:56:21,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:56:21,217 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 248 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:21,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 19:56:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-12-18 19:56:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-18 19:56:21,220 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-12-18 19:56:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:21,220 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-18 19:56:21,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-18 19:56:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-18 19:56:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:56:21,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:21,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:21,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 19:56:21,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:21,435 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446106, now seen corresponding path program 1 times [2021-12-18 19:56:21,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:21,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277344109] [2021-12-18 19:56:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:21,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:21,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277344109] [2021-12-18 19:56:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277344109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:21,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:21,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:56:21,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630671894] [2021-12-18 19:56:21,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:21,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:21,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:21,467 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:21,493 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-18 19:56:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:56:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:21,493 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:56:21,494 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:56:21,494 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 [2021-12-18 19:56:21,494 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:21,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:56:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:56:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-18 19:56:21,498 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-12-18 19:56:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:21,498 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-18 19:56:21,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-18 19:56:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:56:21,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:21,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:21,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:56:21,502 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:21,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446105, now seen corresponding path program 1 times [2021-12-18 19:56:21,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:21,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024223310] [2021-12-18 19:56:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:21,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:21,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024223310] [2021-12-18 19:56:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024223310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:21,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:21,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:56:21,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035586015] [2021-12-18 19:56:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:56:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:56:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:56:21,555 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2021-12-18 19:56:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:21,598 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-12-18 19:56:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:56:21,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 [2021-12-18 19:56:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:21,599 INFO L225 Difference]: With dead ends: 72 [2021-12-18 19:56:21,599 INFO L226 Difference]: Without dead ends: 72 [2021-12-18 19:56:21,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:56:21,599 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:21,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 67 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-18 19:56:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-12-18 19:56:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-12-18 19:56:21,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 13 [2021-12-18 19:56:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:21,602 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-12-18 19:56:21,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2021-12-18 19:56:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-12-18 19:56:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:56:21,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:21,602 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:21,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:56:21,602 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-18 19:56:21,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:21,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688996899] [2021-12-18 19:56:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:21,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:21,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:21,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688996899] [2021-12-18 19:56:21,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688996899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:21,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946230041] [2021-12-18 19:56:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:21,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:21,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:21,651 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) [2021-12-18 19:56:21,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:56:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:56:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:21,732 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:56:21,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:56:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:21,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946230041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:21,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:21,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-18 19:56:21,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185981699] [2021-12-18 19:56:21,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:21,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:56:21,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:56:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:56:21,931 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,057 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2021-12-18 19:56:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:56:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 19:56:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,058 INFO L225 Difference]: With dead ends: 130 [2021-12-18 19:56:22,058 INFO L226 Difference]: Without dead ends: 130 [2021-12-18 19:56:22,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:56:22,059 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 221 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 224 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-18 19:56:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 59. [2021-12-18 19:56:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.42) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-12-18 19:56:22,062 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 13 [2021-12-18 19:56:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,062 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-12-18 19:56:22,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-12-18 19:56:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:56:22,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:22,279 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,SelfDestructingSolverStorable11 [2021-12-18 19:56:22,280 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 172810365, now seen corresponding path program 1 times [2021-12-18 19:56:22,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607384453] [2021-12-18 19:56:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607384453] [2021-12-18 19:56:22,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607384453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:56:22,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464319056] [2021-12-18 19:56:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:56:22,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:56:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:56:22,352 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,374 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-18 19:56:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:56:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:56:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,375 INFO L225 Difference]: With dead ends: 58 [2021-12-18 19:56:22,375 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:56:22,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:56:22,376 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:56:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-18 19:56:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-18 19:56:22,377 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-12-18 19:56:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,378 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-18 19:56:22,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-18 19:56:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:56:22,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:56:22,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174023, now seen corresponding path program 1 times [2021-12-18 19:56:22,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993642813] [2021-12-18 19:56:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993642813] [2021-12-18 19:56:22,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993642813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:56:22,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16559759] [2021-12-18 19:56:22,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:56:22,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:56:22,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:56:22,401 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,435 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-18 19:56:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:56:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:56:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,436 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:56:22,436 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:56:22,437 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 [2021-12-18 19:56:22,437 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 64 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:56:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:56:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-18 19:56:22,439 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 15 [2021-12-18 19:56:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,439 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-18 19:56:22,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-18 19:56:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:56:22,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 19:56:22,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174024, now seen corresponding path program 1 times [2021-12-18 19:56:22,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665780882] [2021-12-18 19:56:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665780882] [2021-12-18 19:56:22,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665780882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:56:22,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026497096] [2021-12-18 19:56:22,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:56:22,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:56:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:56:22,488 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,551 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-18 19:56:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:56:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:56:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,552 INFO L225 Difference]: With dead ends: 53 [2021-12-18 19:56:22,552 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:56:22,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:56:22,552 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 70 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:56:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:56:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-18 19:56:22,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 15 [2021-12-18 19:56:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,554 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-18 19:56:22,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-18 19:56:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:56:22,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 19:56:22,555 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978584, now seen corresponding path program 1 times [2021-12-18 19:56:22,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64927179] [2021-12-18 19:56:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64927179] [2021-12-18 19:56:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64927179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:56:22,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916049128] [2021-12-18 19:56:22,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:56:22,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:56:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:56:22,575 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,595 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-18 19:56:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:56:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:56:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,596 INFO L225 Difference]: With dead ends: 52 [2021-12-18 19:56:22,596 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 19:56:22,596 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 [2021-12-18 19:56:22,597 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 19:56:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-18 19:56:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-18 19:56:22,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 17 [2021-12-18 19:56:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,599 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-18 19:56:22,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-18 19:56:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:56:22,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:56:22,600 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978583, now seen corresponding path program 1 times [2021-12-18 19:56:22,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943026533] [2021-12-18 19:56:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943026533] [2021-12-18 19:56:22,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943026533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:56:22,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004850268] [2021-12-18 19:56:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:56:22,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:56:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:56:22,647 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,703 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-18 19:56:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:56:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:56:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,704 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:56:22,704 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:56:22,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:56:22,705 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:56:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-12-18 19:56:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-18 19:56:22,706 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-12-18 19:56:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,707 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-18 19:56:22,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-18 19:56:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:56:22,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 19:56:22,708 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash -448353975, now seen corresponding path program 1 times [2021-12-18 19:56:22,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017914454] [2021-12-18 19:56:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017914454] [2021-12-18 19:56:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017914454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:56:22,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591956050] [2021-12-18 19:56:22,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:56:22,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:56:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:56:22,759 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,790 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-18 19:56:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:56:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-18 19:56:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,791 INFO L225 Difference]: With dead ends: 52 [2021-12-18 19:56:22,791 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 19:56:22,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:56:22,792 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 19:56:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-18 19:56:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-18 19:56:22,793 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 19 [2021-12-18 19:56:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,793 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-18 19:56:22,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-18 19:56:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:56:22,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 19:56:22,794 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash -448353974, now seen corresponding path program 1 times [2021-12-18 19:56:22,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50783589] [2021-12-18 19:56:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:22,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50783589] [2021-12-18 19:56:22,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50783589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:22,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:22,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:56:22,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859435575] [2021-12-18 19:56:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:22,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:56:22,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:56:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:56:22,893 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:22,981 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-12-18 19:56:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:56:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-18 19:56:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:22,982 INFO L225 Difference]: With dead ends: 60 [2021-12-18 19:56:22,982 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:56:22,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:56:22,983 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:22,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 100 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:56:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-12-18 19:56:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-18 19:56:22,984 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2021-12-18 19:56:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:22,984 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-18 19:56:22,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-18 19:56:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:56:22,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:22,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:22,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 19:56:22,985 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1075479959, now seen corresponding path program 1 times [2021-12-18 19:56:22,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:22,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534218660] [2021-12-18 19:56:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:22,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:23,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:23,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534218660] [2021-12-18 19:56:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534218660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:23,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:56:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732445145] [2021-12-18 19:56:23,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:23,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:56:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:56:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:56:23,064 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:23,137 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-18 19:56:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:56:23,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:56:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:23,138 INFO L225 Difference]: With dead ends: 68 [2021-12-18 19:56:23,138 INFO L226 Difference]: Without dead ends: 46 [2021-12-18 19:56:23,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:56:23,139 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:23,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 187 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-18 19:56:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-18 19:56:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-18 19:56:23,140 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2021-12-18 19:56:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:23,141 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-18 19:56:23,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-18 19:56:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:56:23,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:23,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:23,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 19:56:23,142 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1530543595, now seen corresponding path program 1 times [2021-12-18 19:56:23,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919310290] [2021-12-18 19:56:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:23,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:23,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:23,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919310290] [2021-12-18 19:56:23,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919310290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:23,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:23,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:56:23,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132062406] [2021-12-18 19:56:23,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:23,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:56:23,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:56:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:56:23,249 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:23,409 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-12-18 19:56:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:56:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:56:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:23,410 INFO L225 Difference]: With dead ends: 71 [2021-12-18 19:56:23,410 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:56:23,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:56:23,411 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:23,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 163 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:56:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-18 19:56:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-18 19:56:23,412 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2021-12-18 19:56:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:23,412 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-18 19:56:23,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-18 19:56:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:56:23,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:23,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:23,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 19:56:23,413 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1247746578, now seen corresponding path program 1 times [2021-12-18 19:56:23,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:23,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715647741] [2021-12-18 19:56:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:23,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:23,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715647741] [2021-12-18 19:56:23,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715647741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675742227] [2021-12-18 19:56:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:23,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:23,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:23,482 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) [2021-12-18 19:56:23,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:56:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:23,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 19:56:23,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:56:23,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:56:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:56:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:23,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:23,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675742227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:23,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:23,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2021-12-18 19:56:23,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796179586] [2021-12-18 19:56:23,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:23,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 19:56:23,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 19:56:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-18 19:56:23,866 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:24,079 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-12-18 19:56:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:56:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:56:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:24,080 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:56:24,080 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 19:56:24,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:56:24,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 222 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:24,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 127 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 19:56:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-12-18 19:56:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-18 19:56:24,082 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 25 [2021-12-18 19:56:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:24,083 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-18 19:56:24,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-18 19:56:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:56:24,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:24,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:24,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 19:56:24,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:24,300 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -788585585, now seen corresponding path program 1 times [2021-12-18 19:56:24,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373161750] [2021-12-18 19:56:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:24,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:24,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:24,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373161750] [2021-12-18 19:56:24,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373161750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:24,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:24,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 19:56:24,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492685794] [2021-12-18 19:56:24,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:24,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:56:24,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:56:24,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:56:24,415 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:24,546 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-12-18 19:56:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:56:24,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 19:56:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:24,547 INFO L225 Difference]: With dead ends: 61 [2021-12-18 19:56:24,547 INFO L226 Difference]: Without dead ends: 43 [2021-12-18 19:56:24,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:56:24,547 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:24,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 211 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-18 19:56:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-18 19:56:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-18 19:56:24,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 27 [2021-12-18 19:56:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:24,549 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-18 19:56:24,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-18 19:56:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:56:24,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:24,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 19:56:24,549 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash -922599091, now seen corresponding path program 1 times [2021-12-18 19:56:24,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:24,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961458866] [2021-12-18 19:56:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:24,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:24,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961458866] [2021-12-18 19:56:24,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961458866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:24,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:56:24,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 19:56:24,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999560022] [2021-12-18 19:56:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:24,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:56:24,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:56:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:56:24,750 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:24,892 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-12-18 19:56:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:56:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 19:56:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:24,893 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:56:24,893 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 19:56:24,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:56:24,893 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:24,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 161 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 19:56:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-12-18 19:56:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.15) internal successors, (46), 43 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) [2021-12-18 19:56:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-18 19:56:24,895 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2021-12-18 19:56:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:24,895 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-18 19:56:24,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-18 19:56:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 19:56:24,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:24,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:24,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 19:56:24,896 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 904511312, now seen corresponding path program 1 times [2021-12-18 19:56:24,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:24,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145530280] [2021-12-18 19:56:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:24,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145530280] [2021-12-18 19:56:24,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145530280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906947381] [2021-12-18 19:56:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:24,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:24,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:24,980 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) [2021-12-18 19:56:24,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:56:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:25,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:56:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:25,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:25,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:56:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:25,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906947381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:25,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:25,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-18 19:56:25,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61037257] [2021-12-18 19:56:25,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:25,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:56:25,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:56:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:56:25,285 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:25,518 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-12-18 19:56:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:56:25,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-18 19:56:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:25,519 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:56:25,519 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:56:25,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:56:25,519 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:25,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 191 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:56:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-18 19:56:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-12-18 19:56:25,520 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2021-12-18 19:56:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:25,520 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-12-18 19:56:25,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-12-18 19:56:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 19:56:25,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:25,521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:25,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:25,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:25,721 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1651977841, now seen corresponding path program 1 times [2021-12-18 19:56:25,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:25,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450347061] [2021-12-18 19:56:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:25,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:56:25,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450347061] [2021-12-18 19:56:25,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450347061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417352648] [2021-12-18 19:56:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:25,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:25,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:25,759 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) [2021-12-18 19:56:25,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:56:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:25,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:56:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:56:25,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:25,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:56:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:56:25,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417352648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:25,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:25,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-18 19:56:25,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796430908] [2021-12-18 19:56:25,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:25,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:56:25,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:25,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:56:25,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:56:25,932 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:25,991 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-12-18 19:56:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:56:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-18 19:56:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:25,992 INFO L225 Difference]: With dead ends: 45 [2021-12-18 19:56:25,992 INFO L226 Difference]: Without dead ends: 45 [2021-12-18 19:56:25,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:56:25,993 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:25,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-18 19:56:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-18 19:56:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 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) [2021-12-18 19:56:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-18 19:56:25,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2021-12-18 19:56:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:25,994 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-18 19:56:25,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-18 19:56:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 19:56:25,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:25,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:26,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:26,211 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,SelfDestructingSolverStorable25 [2021-12-18 19:56:26,213 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1587501230, now seen corresponding path program 1 times [2021-12-18 19:56:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:26,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276520934] [2021-12-18 19:56:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:26,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:26,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:26,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276520934] [2021-12-18 19:56:26,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276520934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:26,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516464534] [2021-12-18 19:56:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:26,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:26,306 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) [2021-12-18 19:56:26,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:56:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 19:56:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:26,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:56:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:26,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516464534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:26,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:26,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-18 19:56:26,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804964903] [2021-12-18 19:56:26,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:26,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:56:26,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:56:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:56:26,681 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 22 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:26,941 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-12-18 19:56:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:56:26,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 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 [2021-12-18 19:56:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:26,942 INFO L225 Difference]: With dead ends: 59 [2021-12-18 19:56:26,942 INFO L226 Difference]: Without dead ends: 56 [2021-12-18 19:56:26,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:56:26,943 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 265 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:26,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 246 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-18 19:56:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-12-18 19:56:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-12-18 19:56:26,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2021-12-18 19:56:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:26,944 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-12-18 19:56:26,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-12-18 19:56:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 19:56:26,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:26,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:26,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:27,145 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,SelfDestructingSolverStorable26 [2021-12-18 19:56:27,145 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -579332495, now seen corresponding path program 1 times [2021-12-18 19:56:27,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:27,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195907005] [2021-12-18 19:56:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:27,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:27,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:27,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195907005] [2021-12-18 19:56:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195907005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:27,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417325008] [2021-12-18 19:56:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:27,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:27,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:27,329 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) [2021-12-18 19:56:27,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:56:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 19:56:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:27,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:56:27,882 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-12-18 19:56:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-12-18 19:56:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:27,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:34,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:56:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:56:34,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 19:56:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:56:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417325008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:34,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:34,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 36 [2021-12-18 19:56:34,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312353928] [2021-12-18 19:56:34,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:34,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:56:34,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:56:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1134, Unknown=10, NotChecked=0, Total=1260 [2021-12-18 19:56:34,897 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:35,399 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2021-12-18 19:56:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:56:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-18 19:56:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:35,400 INFO L225 Difference]: With dead ends: 124 [2021-12-18 19:56:35,400 INFO L226 Difference]: Without dead ends: 60 [2021-12-18 19:56:35,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=316, Invalid=2644, Unknown=10, NotChecked=0, Total=2970 [2021-12-18 19:56:35,401 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 134 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:35,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 380 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 243 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-12-18 19:56:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-18 19:56:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-18 19:56:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 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) [2021-12-18 19:56:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-18 19:56:35,403 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 37 [2021-12-18 19:56:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:35,403 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-18 19:56:35,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-18 19:56:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 19:56:35,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:35,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:35,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:35,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:35,614 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash -491067849, now seen corresponding path program 2 times [2021-12-18 19:56:35,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:35,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326352347] [2021-12-18 19:56:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:35,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:35,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326352347] [2021-12-18 19:56:35,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326352347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457507066] [2021-12-18 19:56:35,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:56:35,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:35,715 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) [2021-12-18 19:56:35,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:56:35,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:56:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:56:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:35,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:36,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:56:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:36,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457507066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:36,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:36,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-18 19:56:36,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666494993] [2021-12-18 19:56:36,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:56:36,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:56:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:56:36,142 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:36,352 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-12-18 19:56:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:56:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-18 19:56:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:36,353 INFO L225 Difference]: With dead ends: 67 [2021-12-18 19:56:36,353 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 19:56:36,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:56:36,353 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 249 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:36,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 195 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 19:56:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-12-18 19:56:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-12-18 19:56:36,355 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 45 [2021-12-18 19:56:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:36,355 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-12-18 19:56:36,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-12-18 19:56:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 19:56:36,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:36,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:36,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-18 19:56:36,555 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,SelfDestructingSolverStorable28 [2021-12-18 19:56:36,556 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 530199960, now seen corresponding path program 2 times [2021-12-18 19:56:36,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:36,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537452922] [2021-12-18 19:56:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:36,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:36,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:36,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537452922] [2021-12-18 19:56:36,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537452922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:36,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677511063] [2021-12-18 19:56:36,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:56:36,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:36,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:36,656 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) [2021-12-18 19:56:36,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:56:36,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:56:36,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:36,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:56:36,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:36,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:56:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677511063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:37,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:37,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-18 19:56:37,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615209706] [2021-12-18 19:56:37,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:37,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:56:37,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:56:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:56:37,135 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 23 states, 22 states have (on average 4.0) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:37,464 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-12-18 19:56:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:56:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.0) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 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 47 [2021-12-18 19:56:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:37,465 INFO L225 Difference]: With dead ends: 62 [2021-12-18 19:56:37,465 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 19:56:37,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:56:37,466 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 249 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:37,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 232 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 19:56:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-12-18 19:56:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-12-18 19:56:37,468 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2021-12-18 19:56:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:37,468 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-12-18 19:56:37,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.0) internal successors, (88), 23 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-12-18 19:56:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:56:37,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:37,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:37,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:37,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:37,685 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:37,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1243825766, now seen corresponding path program 2 times [2021-12-18 19:56:37,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:37,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612533225] [2021-12-18 19:56:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:37,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:37,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612533225] [2021-12-18 19:56:37,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612533225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:37,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663751018] [2021-12-18 19:56:37,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:56:37,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:37,837 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) [2021-12-18 19:56:37,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:56:37,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 19:56:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 19:56:37,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 19:56:38,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:56:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663751018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:56:38,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:56:38,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2021-12-18 19:56:38,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035123516] [2021-12-18 19:56:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:56:38,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:56:38,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:56:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:56:38,005 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 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) [2021-12-18 19:56:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:38,053 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-12-18 19:56:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:56:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 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) Word has length 51 [2021-12-18 19:56:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:38,054 INFO L225 Difference]: With dead ends: 60 [2021-12-18 19:56:38,054 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:56:38,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:56:38,055 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:38,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:56:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:56:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:56:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-18 19:56:38,056 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2021-12-18 19:56:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-18 19:56:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 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) [2021-12-18 19:56:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-18 19:56:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 19:56:38,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:38,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:38,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:38,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-18 19:56:38,276 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1019693383, now seen corresponding path program 3 times [2021-12-18 19:56:38,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140804716] [2021-12-18 19:56:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:38,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:38,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140804716] [2021-12-18 19:56:38,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140804716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143475950] [2021-12-18 19:56:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:56:38,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:38,434 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) [2021-12-18 19:56:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:56:38,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:56:38,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 19:56:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:38,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:56:39,188 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-12-18 19:56:39,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-12-18 19:56:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:39,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:39,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:39,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:56:39,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:56:39,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:39,592 INFO L388 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 60 treesize of output 56 [2021-12-18 19:56:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:56:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143475950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:39,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:39,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 43 [2021-12-18 19:56:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469180999] [2021-12-18 19:56:39,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:39,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:56:39,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:56:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:56:39,778 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 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) [2021-12-18 19:56:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:40,589 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2021-12-18 19:56:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-18 19:56:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 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) Word has length 53 [2021-12-18 19:56:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:40,590 INFO L225 Difference]: With dead ends: 163 [2021-12-18 19:56:40,590 INFO L226 Difference]: Without dead ends: 71 [2021-12-18 19:56:40,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=372, Invalid=4050, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:56:40,592 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 139 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:40,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 451 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 379 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2021-12-18 19:56:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-18 19:56:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-12-18 19:56:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-12-18 19:56:40,593 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2021-12-18 19:56:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-12-18 19:56:40,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 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) [2021-12-18 19:56:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-12-18 19:56:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:56:40,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:40,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:40,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-18 19:56:40,803 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2077042049, now seen corresponding path program 4 times [2021-12-18 19:56:40,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816443334] [2021-12-18 19:56:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:40,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:40,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816443334] [2021-12-18 19:56:40,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816443334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531727839] [2021-12-18 19:56:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:56:40,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:40,913 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) [2021-12-18 19:56:40,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:56:40,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:56:40,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:56:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:56:41,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:56:41,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:56:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:41,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:41,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531727839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:41,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:41,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-12-18 19:56:41,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058733836] [2021-12-18 19:56:41,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:56:41,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:56:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:56:41,753 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 30 states, 29 states have (on average 5.206896551724138) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:42,082 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-12-18 19:56:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:56:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.206896551724138) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 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 61 [2021-12-18 19:56:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:42,084 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:56:42,084 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:56:42,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:56:42,085 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 258 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:42,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 216 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:56:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-12-18 19:56:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-12-18 19:56:42,086 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2021-12-18 19:56:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:42,087 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-12-18 19:56:42,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.206896551724138) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-12-18 19:56:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 19:56:42,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:42,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:42,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-18 19:56:42,305 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,SelfDestructingSolverStorable32 [2021-12-18 19:56:42,305 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1122383840, now seen corresponding path program 3 times [2021-12-18 19:56:42,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:42,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161012118] [2021-12-18 19:56:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:42,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:42,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161012118] [2021-12-18 19:56:42,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161012118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302145870] [2021-12-18 19:56:42,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:56:42,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:42,441 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) [2021-12-18 19:56:42,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:56:42,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:56:42,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:56:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:42,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:56:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:43,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302145870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:43,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:43,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-18 19:56:43,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421489806] [2021-12-18 19:56:43,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:43,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:56:43,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:56:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:56:43,044 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:43,375 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-12-18 19:56:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 19:56:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-18 19:56:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:43,376 INFO L225 Difference]: With dead ends: 74 [2021-12-18 19:56:43,376 INFO L226 Difference]: Without dead ends: 74 [2021-12-18 19:56:43,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:56:43,377 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 352 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 283 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:56:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-18 19:56:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-12-18 19:56:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-12-18 19:56:43,378 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2021-12-18 19:56:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:43,379 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-12-18 19:56:43,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-12-18 19:56:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 19:56:43,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:43,379 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:43,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-18 19:56:43,579 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,SelfDestructingSolverStorable33 [2021-12-18 19:56:43,579 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -356785407, now seen corresponding path program 5 times [2021-12-18 19:56:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926115838] [2021-12-18 19:56:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:43,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926115838] [2021-12-18 19:56:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926115838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642432121] [2021-12-18 19:56:43,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:56:43,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:43,783 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) [2021-12-18 19:56:43,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:56:44,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:56:44,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:44,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 19:56:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:44,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:56:44,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:56:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:56:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:56:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:44,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:44,605 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_602 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_602) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-18 19:56:44,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:44,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:56:44,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:44,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:56:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:56:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:44,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642432121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:44,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:44,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2021-12-18 19:56:44,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929026333] [2021-12-18 19:56:44,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:44,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:56:44,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:56:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=727, Unknown=1, NotChecked=54, Total=870 [2021-12-18 19:56:44,840 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:45,221 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2021-12-18 19:56:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:56:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 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 [2021-12-18 19:56:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:45,222 INFO L225 Difference]: With dead ends: 128 [2021-12-18 19:56:45,223 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:56:45,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1459, Unknown=1, NotChecked=78, Total=1722 [2021-12-18 19:56:45,223 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:45,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 467 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2021-12-18 19:56:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:56:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-12-18 19:56:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-12-18 19:56:45,225 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2021-12-18 19:56:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:45,225 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-12-18 19:56:45,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-12-18 19:56:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:56:45,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:45,229 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:45,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-18 19:56:45,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:45,439 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1976497660, now seen corresponding path program 6 times [2021-12-18 19:56:45,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:45,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892869903] [2021-12-18 19:56:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:45,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:45,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892869903] [2021-12-18 19:56:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892869903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679432216] [2021-12-18 19:56:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:56:45,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:45,579 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) [2021-12-18 19:56:45,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:56:45,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:56:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 19:56:45,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:46,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:46,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:56:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:56:46,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679432216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:46,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:46,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-18 19:56:46,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282187692] [2021-12-18 19:56:46,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:46,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:56:46,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:56:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:56:46,308 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 33 states, 32 states have (on average 5.09375) internal successors, (163), 33 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:46,638 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-12-18 19:56:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:56:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.09375) internal successors, (163), 33 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-18 19:56:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:46,639 INFO L225 Difference]: With dead ends: 87 [2021-12-18 19:56:46,639 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 19:56:46,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1554, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:56:46,640 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 308 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:46,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 238 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:56:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 19:56:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-12-18 19:56:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-12-18 19:56:46,641 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 73 [2021-12-18 19:56:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:46,641 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-12-18 19:56:46,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.09375) internal successors, (163), 33 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-12-18 19:56:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-18 19:56:46,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:46,642 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:46,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:46,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:46,855 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1038706139, now seen corresponding path program 4 times [2021-12-18 19:56:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128979483] [2021-12-18 19:56:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:46,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:47,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128979483] [2021-12-18 19:56:47,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128979483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571707008] [2021-12-18 19:56:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:56:47,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:47,327 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) [2021-12-18 19:56:47,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:56:47,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:56:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 19:56:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:47,458 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:56:47,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:56:47,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:56:48,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:56:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:56:48,328 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-18 19:56:48,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-18 19:56:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 46 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:48,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:51,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2021-12-18 19:56:51,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-18 19:56:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 56 refuted. 1 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:51,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571707008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:51,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:51,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 22] total 60 [2021-12-18 19:56:51,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168612756] [2021-12-18 19:56:51,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:51,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 19:56:51,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:51,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 19:56:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3303, Unknown=2, NotChecked=0, Total=3540 [2021-12-18 19:56:51,736 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 60 states, 60 states have (on average 3.0) internal successors, (180), 60 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) [2021-12-18 19:56:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:52,937 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2021-12-18 19:56:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:56:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.0) internal successors, (180), 60 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) Word has length 75 [2021-12-18 19:56:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:52,941 INFO L225 Difference]: With dead ends: 127 [2021-12-18 19:56:52,941 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 19:56:52,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=659, Invalid=7529, Unknown=2, NotChecked=0, Total=8190 [2021-12-18 19:56:52,943 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 169 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:52,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 834 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 602 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2021-12-18 19:56:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 19:56:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-12-18 19:56:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-12-18 19:56:52,945 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 75 [2021-12-18 19:56:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:52,945 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-12-18 19:56:52,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.0) internal successors, (180), 60 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) [2021-12-18 19:56:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-12-18 19:56:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 19:56:52,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:52,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:52,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:53,164 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,SelfDestructingSolverStorable36 [2021-12-18 19:56:53,165 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1978254888, now seen corresponding path program 5 times [2021-12-18 19:56:53,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:53,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351775267] [2021-12-18 19:56:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:53,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:53,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:53,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351775267] [2021-12-18 19:56:53,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351775267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634760154] [2021-12-18 19:56:53,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:56:53,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:53,337 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) [2021-12-18 19:56:53,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:56:53,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:56:53,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-18 19:56:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:53,685 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:56:53,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:56:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:54,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:54,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634760154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:54,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:54,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2021-12-18 19:56:54,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546905197] [2021-12-18 19:56:54,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:54,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:56:54,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:56:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:56:54,615 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 36 states, 35 states have (on average 5.085714285714285) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:55,003 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-12-18 19:56:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:56:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.085714285714285) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-18 19:56:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:55,004 INFO L225 Difference]: With dead ends: 90 [2021-12-18 19:56:55,004 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 19:56:55,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:56:55,005 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 350 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:55,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 380 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:56:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 19:56:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-12-18 19:56:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-12-18 19:56:55,012 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 79 [2021-12-18 19:56:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:55,012 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-12-18 19:56:55,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.085714285714285) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-12-18 19:56:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 19:56:55,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:55,013 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:55,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:55,218 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,SelfDestructingSolverStorable37 [2021-12-18 19:56:55,219 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash 622697289, now seen corresponding path program 7 times [2021-12-18 19:56:55,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936395802] [2021-12-18 19:56:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:55,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:55,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936395802] [2021-12-18 19:56:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936395802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836483721] [2021-12-18 19:56:55,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:56:55,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:55,486 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) [2021-12-18 19:56:55,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:56:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:55,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:56:55,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:55,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:56:55,813 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-12-18 19:56:55,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-18 19:56:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:56:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:55,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:58,102 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-18 19:56:58,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-18 19:56:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:58,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836483721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:58,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:58,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 32 [2021-12-18 19:56:58,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932899817] [2021-12-18 19:56:58,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:58,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:56:58,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:56:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=843, Unknown=1, NotChecked=58, Total=992 [2021-12-18 19:56:58,272 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:58,890 WARN L838 $PredicateComparison]: unable to prove that (and (<= 5 |c_ULTIMATE.start_main_~length1~0#1|) (<= |c_ULTIMATE.start_main_~length1~0#1| 5) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0))) is different from false [2021-12-18 19:56:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:59,084 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2021-12-18 19:56:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:56:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-18 19:56:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:59,084 INFO L225 Difference]: With dead ends: 156 [2021-12-18 19:56:59,084 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:56:59,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=141, Invalid=1347, Unknown=2, NotChecked=150, Total=1640 [2021-12-18 19:56:59,085 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:59,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 554 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 597 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2021-12-18 19:56:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:56:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-12-18 19:56:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-12-18 19:56:59,087 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 85 [2021-12-18 19:56:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:59,087 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-12-18 19:56:59,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:56:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-12-18 19:56:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 19:56:59,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:59,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:59,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:59,303 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,SelfDestructingSolverStorable38 [2021-12-18 19:56:59,303 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:56:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash 224549964, now seen corresponding path program 8 times [2021-12-18 19:56:59,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:59,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544448481] [2021-12-18 19:56:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:59,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:59,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544448481] [2021-12-18 19:56:59,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544448481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088503045] [2021-12-18 19:56:59,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:56:59,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:59,480 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) [2021-12-18 19:56:59,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:56:59,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:56:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-18 19:56:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:56:59,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:00,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:57:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:57:00,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088503045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:00,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:00,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-18 19:57:00,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121599566] [2021-12-18 19:57:00,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:00,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:57:00,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:57:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:57:00,250 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:00,617 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-12-18 19:57:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:57:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-18 19:57:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:00,618 INFO L225 Difference]: With dead ends: 103 [2021-12-18 19:57:00,618 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 19:57:00,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:57:00,618 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 373 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:00,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 436 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:57:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 19:57:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-12-18 19:57:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-12-18 19:57:00,620 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2021-12-18 19:57:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:00,620 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-12-18 19:57:00,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-12-18 19:57:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-18 19:57:00,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:00,620 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:00,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:00,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:57:00,821 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:57:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1044150893, now seen corresponding path program 6 times [2021-12-18 19:57:00,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:00,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890271278] [2021-12-18 19:57:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:00,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:01,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:01,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890271278] [2021-12-18 19:57:01,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890271278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:01,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790328954] [2021-12-18 19:57:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:57:01,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:01,386 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) [2021-12-18 19:57:01,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:57:01,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:57:01,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-18 19:57:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:01,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:02,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:02,570 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-18 19:57:02,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-18 19:57:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:57:02,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:02,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:57:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:57:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790328954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:03,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:03,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 21] total 66 [2021-12-18 19:57:03,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081069784] [2021-12-18 19:57:03,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:03,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:57:03,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:57:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4054, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:57:03,155 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 66 states, 66 states have (on average 3.3484848484848486) internal successors, (221), 66 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:04,140 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2021-12-18 19:57:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:57:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.3484848484848486) internal successors, (221), 66 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-18 19:57:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:04,141 INFO L225 Difference]: With dead ends: 151 [2021-12-18 19:57:04,141 INFO L226 Difference]: Without dead ends: 109 [2021-12-18 19:57:04,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=428, Invalid=6378, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 19:57:04,143 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:04,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1015 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1446 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2021-12-18 19:57:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-18 19:57:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2021-12-18 19:57:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 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) [2021-12-18 19:57:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-12-18 19:57:04,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 91 [2021-12-18 19:57:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:04,144 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-12-18 19:57:04,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.3484848484848486) internal successors, (221), 66 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-12-18 19:57:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-18 19:57:04,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:04,145 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:04,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-18 19:57:04,353 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,SelfDestructingSolverStorable40 [2021-12-18 19:57:04,353 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:57:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash 180412528, now seen corresponding path program 7 times [2021-12-18 19:57:04,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:04,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44121665] [2021-12-18 19:57:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:04,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:04,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44121665] [2021-12-18 19:57:04,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44121665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051419789] [2021-12-18 19:57:04,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:57:04,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:04,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:04,579 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) [2021-12-18 19:57:04,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:57:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:57:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:05,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:57:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:05,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051419789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:05,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:05,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2021-12-18 19:57:05,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726469294] [2021-12-18 19:57:05,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:05,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:57:05,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:57:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:57:05,368 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 36 states, 35 states have (on average 4.571428571428571) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:05,864 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-12-18 19:57:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:57:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.571428571428571) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 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 95 [2021-12-18 19:57:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:05,868 INFO L225 Difference]: With dead ends: 106 [2021-12-18 19:57:05,868 INFO L226 Difference]: Without dead ends: 106 [2021-12-18 19:57:05,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=471, Invalid=1979, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:57:05,869 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 407 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:05,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 513 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:57:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-18 19:57:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-12-18 19:57:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-12-18 19:57:05,870 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2021-12-18 19:57:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:05,870 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-12-18 19:57:05,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.571428571428571) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-12-18 19:57:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:57:05,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:05,871 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:05,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:06,071 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:57:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1082531951, now seen corresponding path program 9 times [2021-12-18 19:57:06,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:06,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914055369] [2021-12-18 19:57:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:06,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:06,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914055369] [2021-12-18 19:57:06,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914055369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852691696] [2021-12-18 19:57:06,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:57:06,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:06,370 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) [2021-12-18 19:57:06,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:57:06,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:57:06,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 19:57:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:06,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:57:06,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:06,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:57:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:57:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:07,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:07,280 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1035 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1035) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-18 19:57:07,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:07,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:57:07,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:57:07,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:57:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:07,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852691696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:07,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:07,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2021-12-18 19:57:07,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767996498] [2021-12-18 19:57:07,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:07,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:57:07,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:57:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1091, Unknown=1, NotChecked=66, Total=1260 [2021-12-18 19:57:07,572 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 36 states, 36 states have (on average 3.75) internal successors, (135), 36 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:08,202 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2021-12-18 19:57:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:57:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 36 states have internal predecessors, (135), 0 states have call successors, (0), 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 101 [2021-12-18 19:57:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:08,203 INFO L225 Difference]: With dead ends: 184 [2021-12-18 19:57:08,203 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 19:57:08,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=2299, Unknown=1, NotChecked=98, Total=2652 [2021-12-18 19:57:08,204 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 137 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:08,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 868 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 984 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2021-12-18 19:57:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 19:57:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-18 19:57:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-12-18 19:57:08,206 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 101 [2021-12-18 19:57:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:08,206 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-12-18 19:57:08,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 36 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:57:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-12-18 19:57:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 19:57:08,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:08,206 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:08,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:08,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:08,425 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:57:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1575339372, now seen corresponding path program 10 times [2021-12-18 19:57:08,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:08,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918771898] [2021-12-18 19:57:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:08,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:57:08,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918771898] [2021-12-18 19:57:08,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918771898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592202918] [2021-12-18 19:57:08,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:57:08,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:08,622 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) [2021-12-18 19:57:08,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:57:08,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:57:08,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-18 19:57:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:57:10,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:57:10,411 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-12-18 19:57:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-12-18 19:57:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:57:10,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:07,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:58:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:58:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:08,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592202918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:08,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:08,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 29] total 65 [2021-12-18 19:58:08,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936772761] [2021-12-18 19:58:08,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:08,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 19:58:08,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 19:58:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3924, Unknown=45, NotChecked=0, Total=4160 [2021-12-18 19:58:08,080 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 65 states, 65 states have (on average 3.707692307692308) internal successors, (241), 65 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:15,963 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2021-12-18 19:58:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 19:58:15,964 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.707692307692308) internal successors, (241), 65 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-18 19:58:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:15,965 INFO L225 Difference]: With dead ends: 176 [2021-12-18 19:58:15,965 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 19:58:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=670, Invalid=10412, Unknown=48, NotChecked=0, Total=11130 [2021-12-18 19:58:15,966 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 116 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 564 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:15,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1608 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1483 Invalid, 0 Unknown, 564 Unchecked, 0.5s Time] [2021-12-18 19:58:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 19:58:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-12-18 19:58:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-12-18 19:58:15,967 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 105 [2021-12-18 19:58:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-12-18 19:58:15,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.707692307692308) internal successors, (241), 65 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-12-18 19:58:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 19:58:15,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:15,968 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:15,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:16,169 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -813201736, now seen corresponding path program 8 times [2021-12-18 19:58:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:16,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90205541] [2021-12-18 19:58:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:16,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:16,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90205541] [2021-12-18 19:58:16,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90205541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780618094] [2021-12-18 19:58:16,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:58:16,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:16,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:16,441 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) [2021-12-18 19:58:16,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:58:16,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:58:16,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 19:58:16,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:16,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:17,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:58:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:17,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780618094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:17,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:17,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2021-12-18 19:58:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115512129] [2021-12-18 19:58:17,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:17,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:58:17,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:58:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:58:17,341 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 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) [2021-12-18 19:58:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:17,875 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-12-18 19:58:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:58:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-18 19:58:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:17,876 INFO L225 Difference]: With dead ends: 122 [2021-12-18 19:58:17,876 INFO L226 Difference]: Without dead ends: 122 [2021-12-18 19:58:17,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:58:17,877 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 398 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:17,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 512 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:58:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-18 19:58:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-18 19:58:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2021-12-18 19:58:17,879 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 111 [2021-12-18 19:58:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:17,879 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2021-12-18 19:58:17,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 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) [2021-12-18 19:58:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2021-12-18 19:58:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-18 19:58:17,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:17,880 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:17,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:18,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:18,087 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2098417703, now seen corresponding path program 11 times [2021-12-18 19:58:18,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:18,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094845652] [2021-12-18 19:58:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:18,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:18,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094845652] [2021-12-18 19:58:18,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094845652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343221507] [2021-12-18 19:58:18,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:58:18,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:18,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:18,419 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) [2021-12-18 19:58:18,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:58:19,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:58:19,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-18 19:58:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:19,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:19,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:58:19,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:19,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:20,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1235 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1235) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-18 19:58:20,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:58:20,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:58:20,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:58:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:20,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343221507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:20,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:20,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 38 [2021-12-18 19:58:20,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555371244] [2021-12-18 19:58:20,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:20,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:58:20,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:58:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1228, Unknown=1, NotChecked=70, Total=1406 [2021-12-18 19:58:20,337 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 38 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:21,086 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2021-12-18 19:58:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:58:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 38 states have internal predecessors, (150), 0 states have call successors, (0), 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 117 [2021-12-18 19:58:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:21,087 INFO L225 Difference]: With dead ends: 212 [2021-12-18 19:58:21,087 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 19:58:21,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=2563, Unknown=1, NotChecked=104, Total=2970 [2021-12-18 19:58:21,087 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 185 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:21,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 943 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1125 Invalid, 0 Unknown, 145 Unchecked, 0.4s Time] [2021-12-18 19:58:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 19:58:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2021-12-18 19:58:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 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) [2021-12-18 19:58:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-12-18 19:58:21,089 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2021-12-18 19:58:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:21,090 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-12-18 19:58:21,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 38 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-12-18 19:58:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-18 19:58:21,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:21,090 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:21,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:21,306 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,SelfDestructingSolverStorable45 [2021-12-18 19:58:21,306 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2037687516, now seen corresponding path program 12 times [2021-12-18 19:58:21,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517887714] [2021-12-18 19:58:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:21,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:21,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517887714] [2021-12-18 19:58:21,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517887714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527586993] [2021-12-18 19:58:21,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:58:21,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:21,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:21,552 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) [2021-12-18 19:58:21,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:58:21,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:58:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 19:58:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:22,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:22,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:58:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:58:22,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527586993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:22,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:22,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2021-12-18 19:58:22,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211716338] [2021-12-18 19:58:22,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:22,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 19:58:22,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 19:58:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:58:22,945 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:23,542 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-12-18 19:58:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:58:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-18 19:58:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:23,543 INFO L225 Difference]: With dead ends: 135 [2021-12-18 19:58:23,544 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 19:58:23,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:58:23,544 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 631 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:23,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 471 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:58:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 19:58:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2021-12-18 19:58:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 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) [2021-12-18 19:58:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2021-12-18 19:58:23,546 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 121 [2021-12-18 19:58:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:23,547 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2021-12-18 19:58:23,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2021-12-18 19:58:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-18 19:58:23,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:23,548 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:23,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-18 19:58:23,751 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,SelfDestructingSolverStorable46 [2021-12-18 19:58:23,751 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:23,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -287383811, now seen corresponding path program 9 times [2021-12-18 19:58:23,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:23,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432425793] [2021-12-18 19:58:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:23,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:58:24,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432425793] [2021-12-18 19:58:24,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432425793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:24,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735493139] [2021-12-18 19:58:24,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:58:24,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:24,507 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) [2021-12-18 19:58:24,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:58:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 19:58:25,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 188 conjunts are in the unsatisfiable core [2021-12-18 19:58:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:25,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:27,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:58:27,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-12-18 19:58:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:58:27,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:28,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:28,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:58:28,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:58:28,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:28,447 INFO L388 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 55 treesize of output 51 [2021-12-18 19:58:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735493139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:29,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:29,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 40, 30] total 98 [2021-12-18 19:58:29,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207086689] [2021-12-18 19:58:29,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-18 19:58:29,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-18 19:58:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=9089, Unknown=0, NotChecked=0, Total=9506 [2021-12-18 19:58:29,228 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 98 states, 98 states have (on average 3.306122448979592) internal successors, (324), 98 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:31,566 INFO L93 Difference]: Finished difference Result 333 states and 341 transitions. [2021-12-18 19:58:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-18 19:58:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.306122448979592) internal successors, (324), 98 states have internal predecessors, (324), 0 states have call successors, (0), 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 123 [2021-12-18 19:58:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:31,567 INFO L225 Difference]: With dead ends: 333 [2021-12-18 19:58:31,567 INFO L226 Difference]: Without dead ends: 215 [2021-12-18 19:58:31,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5108 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=934, Invalid=16888, Unknown=0, NotChecked=0, Total=17822 [2021-12-18 19:58:31,569 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 384 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:31,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1820 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2173 Invalid, 0 Unknown, 243 Unchecked, 0.8s Time] [2021-12-18 19:58:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-18 19:58:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 135. [2021-12-18 19:58:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-12-18 19:58:31,572 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 123 [2021-12-18 19:58:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:31,572 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-12-18 19:58:31,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.306122448979592) internal successors, (324), 98 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-12-18 19:58:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-18 19:58:31,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:31,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:31,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:31,791 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,SelfDestructingSolverStorable47 [2021-12-18 19:58:31,791 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash 240761088, now seen corresponding path program 10 times [2021-12-18 19:58:31,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679087478] [2021-12-18 19:58:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:31,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 45 proven. 235 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:32,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679087478] [2021-12-18 19:58:32,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679087478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794868857] [2021-12-18 19:58:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:58:32,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:32,093 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) [2021-12-18 19:58:32,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:58:32,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:58:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 19:58:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:32,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:33,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:58:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:33,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794868857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:33,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:33,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2021-12-18 19:58:33,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276646187] [2021-12-18 19:58:33,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:33,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:58:33,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:58:33,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:58:33,215 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:33,905 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-12-18 19:58:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 19:58:33,906 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 states have internal predecessors, (208), 0 states have call successors, (0), 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 127 [2021-12-18 19:58:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:33,906 INFO L225 Difference]: With dead ends: 138 [2021-12-18 19:58:33,906 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 19:58:33,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 19:58:33,907 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 366 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:33,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 641 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:58:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 19:58:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-18 19:58:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-12-18 19:58:33,914 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 127 [2021-12-18 19:58:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:33,915 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-12-18 19:58:33,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-12-18 19:58:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 19:58:33,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:33,916 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:33,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:34,119 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1265497055, now seen corresponding path program 13 times [2021-12-18 19:58:34,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:34,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457649683] [2021-12-18 19:58:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:34,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:34,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457649683] [2021-12-18 19:58:34,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457649683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764925347] [2021-12-18 19:58:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:58:34,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:34,470 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) [2021-12-18 19:58:34,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:58:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-18 19:58:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:34,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:35,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:35,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:58:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:35,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:35,493 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1532 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1532) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-18 19:58:35,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:35,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:58:35,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:35,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:58:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:58:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:35,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764925347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:35,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:35,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 41 [2021-12-18 19:58:35,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007744939] [2021-12-18 19:58:35,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:35,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:58:35,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:58:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1449, Unknown=1, NotChecked=76, Total=1640 [2021-12-18 19:58:35,868 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 41 states, 41 states have (on average 4.048780487804878) internal successors, (166), 41 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) [2021-12-18 19:58:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:36,566 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2021-12-18 19:58:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:58:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.048780487804878) internal successors, (166), 41 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) Word has length 133 [2021-12-18 19:58:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:36,567 INFO L225 Difference]: With dead ends: 240 [2021-12-18 19:58:36,568 INFO L226 Difference]: Without dead ends: 144 [2021-12-18 19:58:36,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=2365, Unknown=1, NotChecked=98, Total=2652 [2021-12-18 19:58:36,568 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:36,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1115 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1302 Invalid, 0 Unknown, 211 Unchecked, 0.4s Time] [2021-12-18 19:58:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-18 19:58:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-12-18 19:58:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 140 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) [2021-12-18 19:58:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-12-18 19:58:36,570 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 133 [2021-12-18 19:58:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-12-18 19:58:36,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.048780487804878) internal successors, (166), 41 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) [2021-12-18 19:58:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-12-18 19:58:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 19:58:36,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:36,571 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:36,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:36,787 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,SelfDestructingSolverStorable49 [2021-12-18 19:58:36,787 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:36,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1083022116, now seen corresponding path program 14 times [2021-12-18 19:58:36,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593011260] [2021-12-18 19:58:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:36,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 66 proven. 286 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:37,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593011260] [2021-12-18 19:58:37,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593011260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241865042] [2021-12-18 19:58:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:58:37,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:37,043 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) [2021-12-18 19:58:37,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:58:37,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:58:37,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 19:58:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:37,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:38,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:58:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:58:38,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241865042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:38,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:38,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2021-12-18 19:58:38,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68985233] [2021-12-18 19:58:38,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:38,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 19:58:38,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 19:58:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:58:38,210 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:38,793 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2021-12-18 19:58:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:58:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 0 states have call successors, (0), 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 137 [2021-12-18 19:58:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:38,795 INFO L225 Difference]: With dead ends: 151 [2021-12-18 19:58:38,795 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 19:58:38,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=616, Invalid=2690, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 19:58:38,796 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 353 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:38,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 711 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:58:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 19:58:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-12-18 19:58:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 146 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2021-12-18 19:58:38,798 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2021-12-18 19:58:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2021-12-18 19:58:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2021-12-18 19:58:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-18 19:58:38,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:38,800 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:38,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-18 19:58:39,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-18 19:58:39,011 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1402168133, now seen corresponding path program 11 times [2021-12-18 19:58:39,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323358993] [2021-12-18 19:58:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:39,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:58:39,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323358993] [2021-12-18 19:58:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323358993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297712710] [2021-12-18 19:58:39,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:58:39,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:39,833 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:58:40,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-18 19:58:40,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 186 conjunts are in the unsatisfiable core [2021-12-18 19:58:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:41,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:41,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:42,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:42,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:58:42,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:58:42,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:42,782 INFO L388 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 60 treesize of output 56 [2021-12-18 19:58:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 301 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:43,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297712710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:43,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:43,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 33] total 79 [2021-12-18 19:58:43,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585141] [2021-12-18 19:58:43,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:43,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 19:58:43,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:43,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 19:58:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=5921, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:58:43,025 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 79 states, 79 states have (on average 3.5822784810126582) internal successors, (283), 79 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:45,976 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2021-12-18 19:58:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:58:45,976 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.5822784810126582) internal successors, (283), 79 states have internal predecessors, (283), 0 states have call successors, (0), 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 139 [2021-12-18 19:58:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:45,977 INFO L225 Difference]: With dead ends: 223 [2021-12-18 19:58:45,977 INFO L226 Difference]: Without dead ends: 157 [2021-12-18 19:58:45,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 238 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=759, Invalid=11451, Unknown=0, NotChecked=0, Total=12210 [2021-12-18 19:58:45,978 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 531 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 4796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:45,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 2470 Invalid, 4796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 4631 Invalid, 0 Unknown, 61 Unchecked, 1.5s Time] [2021-12-18 19:58:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-18 19:58:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2021-12-18 19:58:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-12-18 19:58:45,980 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 139 [2021-12-18 19:58:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:45,980 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-12-18 19:58:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.5822784810126582) internal successors, (283), 79 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-12-18 19:58:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-18 19:58:45,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:45,981 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:45,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:46,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:46,187 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:46,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1923909816, now seen corresponding path program 12 times [2021-12-18 19:58:46,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069024352] [2021-12-18 19:58:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:46,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 66 proven. 302 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:46,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:46,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069024352] [2021-12-18 19:58:46,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069024352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:46,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561308064] [2021-12-18 19:58:46,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:58:46,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:46,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:46,509 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:46,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:58:47,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:58:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-18 19:58:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:47,464 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:58:47,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:58:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:48,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 120 proven. 248 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:49,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561308064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:49,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:49,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 56 [2021-12-18 19:58:49,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942484690] [2021-12-18 19:58:49,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:49,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 19:58:49,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:49,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 19:58:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:58:49,234 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 57 states, 56 states have (on average 5.357142857142857) internal successors, (300), 57 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:50,139 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-12-18 19:58:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:58:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.357142857142857) internal successors, (300), 57 states have internal predecessors, (300), 0 states have call successors, (0), 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 143 [2021-12-18 19:58:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:50,140 INFO L225 Difference]: With dead ends: 154 [2021-12-18 19:58:50,140 INFO L226 Difference]: Without dead ends: 154 [2021-12-18 19:58:50,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1142, Invalid=4710, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 19:58:50,141 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 402 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:50,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 634 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:58:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-18 19:58:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-12-18 19:58:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 152 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) [2021-12-18 19:58:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-12-18 19:58:50,143 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 143 [2021-12-18 19:58:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:50,143 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-12-18 19:58:50,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.357142857142857) internal successors, (300), 57 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-12-18 19:58:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 19:58:50,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:50,144 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:50,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:50,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:50,363 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash 361100393, now seen corresponding path program 15 times [2021-12-18 19:58:50,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:50,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11578853] [2021-12-18 19:58:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:50,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:50,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11578853] [2021-12-18 19:58:50,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11578853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214530260] [2021-12-18 19:58:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:58:50,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:50,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:50,783 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:50,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:58:51,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 19:58:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:51,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-18 19:58:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:51,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:58:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:58:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:58:52,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:58:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 511 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:58:52,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:53,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1861 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1861) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-18 19:58:53,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:53,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:58:53,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:58:53,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:58:53,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:58:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:53,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214530260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:53,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:53,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33, 26] total 58 [2021-12-18 19:58:53,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965831361] [2021-12-18 19:58:53,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:53,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:58:53,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:58:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3017, Unknown=1, NotChecked=110, Total=3306 [2021-12-18 19:58:53,688 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 58 states, 58 states have (on average 4.672413793103448) internal successors, (271), 58 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:55,290 INFO L93 Difference]: Finished difference Result 268 states and 271 transitions. [2021-12-18 19:58:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 19:58:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.672413793103448) internal successors, (271), 58 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-18 19:58:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:55,291 INFO L225 Difference]: With dead ends: 268 [2021-12-18 19:58:55,291 INFO L226 Difference]: Without dead ends: 160 [2021-12-18 19:58:55,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 260 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=382, Invalid=6761, Unknown=1, NotChecked=166, Total=7310 [2021-12-18 19:58:55,292 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 181 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:55,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1877 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3026 Invalid, 0 Unknown, 114 Unchecked, 0.9s Time] [2021-12-18 19:58:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-18 19:58:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-12-18 19:58:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2021-12-18 19:58:55,294 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2021-12-18 19:58:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:55,294 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2021-12-18 19:58:55,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.672413793103448) internal successors, (271), 58 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2021-12-18 19:58:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-18 19:58:55,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:55,295 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:55,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:55,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-18 19:58:55,504 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 545332588, now seen corresponding path program 16 times [2021-12-18 19:58:55,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793805028] [2021-12-18 19:58:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:55,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:55,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793805028] [2021-12-18 19:58:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793805028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496476050] [2021-12-18 19:58:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:58:55,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:55,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:55,805 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:55,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:58:56,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:58:56,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:58:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-18 19:58:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:58:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:56,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:58:57,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-18 19:58:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:58:57,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496476050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:58:57,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:58:57,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2021-12-18 19:58:57,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580966120] [2021-12-18 19:58:57,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:58:57,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 19:58:57,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:58:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 19:58:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:58:57,682 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 57 states, 56 states have (on average 5.339285714285714) internal successors, (299), 57 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:58:58,361 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2021-12-18 19:58:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:58:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.339285714285714) internal successors, (299), 57 states have internal predecessors, (299), 0 states have call successors, (0), 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 153 [2021-12-18 19:58:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:58:58,362 INFO L225 Difference]: With dead ends: 167 [2021-12-18 19:58:58,362 INFO L226 Difference]: Without dead ends: 167 [2021-12-18 19:58:58,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1006, Invalid=3964, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:58:58,363 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1142 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:58:58,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 843 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:58:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-18 19:58:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-12-18 19:58:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-12-18 19:58:58,365 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 153 [2021-12-18 19:58:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:58:58,365 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-12-18 19:58:58,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.339285714285714) internal successors, (299), 57 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:58:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-12-18 19:58:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-18 19:58:58,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:58:58,366 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:58:58,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:58:58,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:58,579 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:58:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:58:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash 78607245, now seen corresponding path program 13 times [2021-12-18 19:58:58,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:58:58,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656103395] [2021-12-18 19:58:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:58:58,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:58:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:58:59,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:58:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656103395] [2021-12-18 19:58:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656103395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:58:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467575666] [2021-12-18 19:58:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:58:59,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:58:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:58:59,459 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:58:59,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:58:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:58:59,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 206 conjunts are in the unsatisfiable core [2021-12-18 19:58:59,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:00,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:00,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:59:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 544 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:00,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:01,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:01,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:59:01,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:59:01,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:01,845 INFO L388 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 60 treesize of output 56 [2021-12-18 19:59:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 392 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:02,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467575666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:02,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:02,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 36] total 86 [2021-12-18 19:59:02,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997694638] [2021-12-18 19:59:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-18 19:59:02,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-18 19:59:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7049, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 19:59:02,104 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 86 states, 86 states have (on average 3.6627906976744184) internal successors, (315), 86 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:05,505 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-12-18 19:59:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:59:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.6627906976744184) internal successors, (315), 86 states have internal predecessors, (315), 0 states have call successors, (0), 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 155 [2021-12-18 19:59:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:05,506 INFO L225 Difference]: With dead ends: 247 [2021-12-18 19:59:05,506 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 19:59:05,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 267 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=785, Invalid=13735, Unknown=0, NotChecked=0, Total=14520 [2021-12-18 19:59:05,507 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 563 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 5485 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 5786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:05,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 2992 Invalid, 5786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5485 Invalid, 0 Unknown, 192 Unchecked, 1.7s Time] [2021-12-18 19:59:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 19:59:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2021-12-18 19:59:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 166 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-12-18 19:59:05,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 155 [2021-12-18 19:59:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:05,509 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-12-18 19:59:05,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.6627906976744184) internal successors, (315), 86 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-12-18 19:59:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-18 19:59:05,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:05,510 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:05,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:05,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 19:59:05,728 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1903115888, now seen corresponding path program 14 times [2021-12-18 19:59:05,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:05,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895384685] [2021-12-18 19:59:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:05,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 91 proven. 377 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:06,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895384685] [2021-12-18 19:59:06,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895384685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731769682] [2021-12-18 19:59:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:59:06,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:06,099 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:06,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:59:06,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:59:06,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-18 19:59:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:06,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:07,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:59:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:07,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731769682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:07,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:07,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 51 [2021-12-18 19:59:07,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436541973] [2021-12-18 19:59:07,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:07,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 19:59:07,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 19:59:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:59:07,412 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:08,299 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-12-18 19:59:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:59:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 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 159 [2021-12-18 19:59:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:08,300 INFO L225 Difference]: With dead ends: 170 [2021-12-18 19:59:08,300 INFO L226 Difference]: Without dead ends: 170 [2021-12-18 19:59:08,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1027, Invalid=4375, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:59:08,301 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 927 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:08,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 956 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:59:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-18 19:59:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-12-18 19:59:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 168 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2021-12-18 19:59:08,303 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 159 [2021-12-18 19:59:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:08,303 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2021-12-18 19:59:08,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2021-12-18 19:59:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-18 19:59:08,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:08,304 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:08,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:08,504 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash -488347471, now seen corresponding path program 17 times [2021-12-18 19:59:08,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:08,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522746090] [2021-12-18 19:59:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:08,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:08,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522746090] [2021-12-18 19:59:08,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522746090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442847410] [2021-12-18 19:59:08,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:59:08,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:08,999 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:09,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:59:10,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 19:59:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-18 19:59:10,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:10,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:59:10,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:59:11,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:59:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:11,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:11,235 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2220 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2220) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-18 19:59:11,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:11,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:59:11,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:11,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:59:11,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:59:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:11,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442847410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:11,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:11,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2021-12-18 19:59:11,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970525909] [2021-12-18 19:59:11,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:11,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 19:59:11,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 19:59:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2037, Unknown=1, NotChecked=90, Total=2256 [2021-12-18 19:59:11,681 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:12,756 INFO L93 Difference]: Finished difference Result 296 states and 299 transitions. [2021-12-18 19:59:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:59:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 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 165 [2021-12-18 19:59:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:12,757 INFO L225 Difference]: With dead ends: 296 [2021-12-18 19:59:12,757 INFO L226 Difference]: Without dead ends: 176 [2021-12-18 19:59:12,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 309 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=3555, Unknown=1, NotChecked=120, Total=3906 [2021-12-18 19:59:12,758 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 67 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:12,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1667 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2029 Invalid, 0 Unknown, 275 Unchecked, 0.6s Time] [2021-12-18 19:59:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-18 19:59:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2021-12-18 19:59:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.023391812865497) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-12-18 19:59:12,761 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 165 [2021-12-18 19:59:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:12,761 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-12-18 19:59:12,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-12-18 19:59:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-18 19:59:12,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:12,762 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:12,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:12,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 19:59:12,962 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1100272716, now seen corresponding path program 18 times [2021-12-18 19:59:12,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:12,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064757466] [2021-12-18 19:59:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:12,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 120 proven. 440 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:13,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064757466] [2021-12-18 19:59:13,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064757466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668948164] [2021-12-18 19:59:13,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:59:13,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:13,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:13,307 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:13,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:59:15,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 19:59:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 19:59:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:59:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:59:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668948164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:16,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:16,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 62 [2021-12-18 19:59:16,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750384626] [2021-12-18 19:59:16,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:16,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 19:59:16,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 19:59:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=3333, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 19:59:16,636 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 63 states, 62 states have (on average 5.725806451612903) internal successors, (355), 63 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:17,534 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2021-12-18 19:59:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:59:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 5.725806451612903) internal successors, (355), 63 states have internal predecessors, (355), 0 states have call successors, (0), 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 169 [2021-12-18 19:59:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:17,535 INFO L225 Difference]: With dead ends: 183 [2021-12-18 19:59:17,535 INFO L226 Difference]: Without dead ends: 183 [2021-12-18 19:59:17,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1566, Invalid=5916, Unknown=0, NotChecked=0, Total=7482 [2021-12-18 19:59:17,540 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 752 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:17,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 795 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:59:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-18 19:59:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2021-12-18 19:59:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 178 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-12-18 19:59:17,542 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 169 [2021-12-18 19:59:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:17,543 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-12-18 19:59:17,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 5.725806451612903) internal successors, (355), 63 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-12-18 19:59:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-18 19:59:17,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:17,544 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:17,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 19:59:17,751 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash -800124971, now seen corresponding path program 15 times [2021-12-18 19:59:17,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:17,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699514702] [2021-12-18 19:59:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:17,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:18,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699514702] [2021-12-18 19:59:18,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699514702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:18,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052371225] [2021-12-18 19:59:18,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:59:18,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:18,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:18,751 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:59:21,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-18 19:59:21,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 254 conjunts are in the unsatisfiable core [2021-12-18 19:59:21,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:21,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:59:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:59:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:21,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:21,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:59:22,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:22,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:24,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:59:24,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-12-18 19:59:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:25,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:27,121 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 2) |ULTIMATE.start_main_~length2~0#1|) (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))))) is different from false [2021-12-18 19:59:27,142 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 2)) (= .cse0 0) (< (+ |c_ULTIMATE.start_main_~i~1#1| 3) |ULTIMATE.start_main_~length2~0#1|) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 3)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~length2~0#1|) (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,285 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9)))) (< (+ |c_ULTIMATE.start_main_~i~1#1| 5) |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 4))))))) is different from false [2021-12-18 19:59:27,356 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 5)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 6) |ULTIMATE.start_main_~length2~0#1|) (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 5)) (= .cse0 0) (< (+ |c_ULTIMATE.start_main_~i~1#1| 6) |ULTIMATE.start_main_~length2~0#1|) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,438 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 6)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 7) |ULTIMATE.start_main_~length2~0#1|) (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,512 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 7)) (= .cse0 0) (< (+ |c_ULTIMATE.start_main_~i~1#1| 8) |ULTIMATE.start_main_~length2~0#1|) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,581 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 8)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 9) |ULTIMATE.start_main_~length2~0#1|) (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9))))))))) is different from false [2021-12-18 19:59:27,680 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2420 (Array Int Int)) (v_ArrVal_2422 Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2420))) (store .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1| (- 1)) v_ArrVal_2422))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1| (- 1)) 0))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)))) (or (<= |ULTIMATE.start_main_~length2~0#1| (+ |c_ULTIMATE.start_main_~i~1#1| 9)) (= .cse0 0) (not (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 9)))) (< (+ |c_ULTIMATE.start_main_~i~1#1| 10) |ULTIMATE.start_main_~length2~0#1|)))))) is different from false [2021-12-18 19:59:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 342 refuted. 0 times theorem prover too weak. 190 trivial. 153 not checked. [2021-12-18 19:59:27,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052371225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:27,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:27,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 52, 42] total 131 [2021-12-18 19:59:27,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225414460] [2021-12-18 19:59:27,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:27,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-18 19:59:27,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:27,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-18 19:59:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=14029, Unknown=12, NotChecked=2470, Total=17030 [2021-12-18 19:59:27,785 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 131 states, 131 states have (on average 3.480916030534351) internal successors, (456), 131 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:30,269 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2021-12-18 19:59:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 19:59:30,278 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.480916030534351) internal successors, (456), 131 states have internal predecessors, (456), 0 states have call successors, (0), 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 171 [2021-12-18 19:59:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:30,279 INFO L225 Difference]: With dead ends: 271 [2021-12-18 19:59:30,279 INFO L226 Difference]: Without dead ends: 189 [2021-12-18 19:59:30,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 269 SyntacticMatches, 11 SemanticMatches, 141 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 5805 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=663, Invalid=16921, Unknown=12, NotChecked=2710, Total=20306 [2021-12-18 19:59:30,280 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 162 mSDsluCounter, 3401 mSDsCounter, 0 mSdLazyCounter, 3901 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 6501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2554 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:30,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 3456 Invalid, 6501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3901 Invalid, 0 Unknown, 2554 Unchecked, 1.2s Time] [2021-12-18 19:59:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-18 19:59:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 183. [2021-12-18 19:59:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.022099447513812) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-12-18 19:59:30,282 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 171 [2021-12-18 19:59:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:30,282 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-12-18 19:59:30,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.480916030534351) internal successors, (456), 131 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-12-18 19:59:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-18 19:59:30,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:30,283 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:30,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:30,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 19:59:30,484 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash -802318376, now seen corresponding path program 16 times [2021-12-18 19:59:30,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:30,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370169541] [2021-12-18 19:59:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:30,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 120 proven. 460 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:30,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370169541] [2021-12-18 19:59:30,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370169541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66482468] [2021-12-18 19:59:30,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:59:30,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:30,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:30,904 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:30,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:59:31,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:59:31,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-18 19:59:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 427 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:32,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:32,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-18 19:59:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 427 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:33,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66482468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:33,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:33,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2021-12-18 19:59:33,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836845203] [2021-12-18 19:59:33,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:33,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:59:33,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:59:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=3822, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:59:33,194 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 66 states, 65 states have (on average 5.061538461538461) internal successors, (329), 66 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:34,728 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2021-12-18 19:59:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:59:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 5.061538461538461) internal successors, (329), 66 states have internal predecessors, (329), 0 states have call successors, (0), 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 175 [2021-12-18 19:59:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:34,729 INFO L225 Difference]: With dead ends: 186 [2021-12-18 19:59:34,729 INFO L226 Difference]: Without dead ends: 186 [2021-12-18 19:59:34,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2055, Invalid=7647, Unknown=0, NotChecked=0, Total=9702 [2021-12-18 19:59:34,730 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1090 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:34,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 1107 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:59:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-18 19:59:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-12-18 19:59:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 184 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2021-12-18 19:59:34,732 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 175 [2021-12-18 19:59:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:34,732 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2021-12-18 19:59:34,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 5.061538461538461) internal successors, (329), 66 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2021-12-18 19:59:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-18 19:59:34,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:34,733 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:34,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-18 19:59:34,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-18 19:59:34,947 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -708220679, now seen corresponding path program 19 times [2021-12-18 19:59:34,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:34,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809999999] [2021-12-18 19:59:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:34,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:35,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809999999] [2021-12-18 19:59:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809999999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42016072] [2021-12-18 19:59:35,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:59:35,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:35,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:35,455 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:35,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 19:59:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-18 19:59:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:35,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:59:36,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:36,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:59:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:59:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:36,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:36,833 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2624 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2624) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0)) is different from false [2021-12-18 19:59:36,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:36,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:59:36,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:36,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:59:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:59:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:37,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42016072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:37,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:37,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 50 [2021-12-18 19:59:37,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374726485] [2021-12-18 19:59:37,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:59:37,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:59:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2220, Unknown=1, NotChecked=94, Total=2450 [2021-12-18 19:59:37,296 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:38,752 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2021-12-18 19:59:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:59:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-18 19:59:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:38,753 INFO L225 Difference]: With dead ends: 324 [2021-12-18 19:59:38,753 INFO L226 Difference]: Without dead ends: 192 [2021-12-18 19:59:38,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 339 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=410, Invalid=4995, Unknown=1, NotChecked=144, Total=5550 [2021-12-18 19:59:38,754 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 275 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:38,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 2033 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2594 Invalid, 0 Unknown, 140 Unchecked, 0.8s Time] [2021-12-18 19:59:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-18 19:59:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2021-12-18 19:59:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 188 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2021-12-18 19:59:38,756 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 181 [2021-12-18 19:59:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2021-12-18 19:59:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2021-12-18 19:59:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-18 19:59:38,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:38,757 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:38,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:38,976 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 996656636, now seen corresponding path program 20 times [2021-12-18 19:59:38,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189178409] [2021-12-18 19:59:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:38,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 153 proven. 529 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:39,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189178409] [2021-12-18 19:59:39,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189178409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121609203] [2021-12-18 19:59:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:59:39,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:39,376 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:39,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 19:59:39,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:59:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:39,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-18 19:59:39,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 190 proven. 492 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:40,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:40,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:59:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 190 proven. 492 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:59:41,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121609203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:41,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:41,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-12-18 19:59:41,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746041245] [2021-12-18 19:59:41,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:41,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 19:59:41,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 19:59:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:59:41,025 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:41,979 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2021-12-18 19:59:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:59:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 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 185 [2021-12-18 19:59:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:41,980 INFO L225 Difference]: With dead ends: 199 [2021-12-18 19:59:41,980 INFO L226 Difference]: Without dead ends: 199 [2021-12-18 19:59:41,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=964, Invalid=4292, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 19:59:41,981 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 840 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:41,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 1329 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:59:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-18 19:59:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2021-12-18 19:59:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 194 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2021-12-18 19:59:41,983 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 185 [2021-12-18 19:59:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:41,983 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2021-12-18 19:59:41,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:59:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2021-12-18 19:59:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-18 19:59:41,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:41,984 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:42,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:42,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:42,199 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:59:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash 9320477, now seen corresponding path program 17 times [2021-12-18 19:59:42,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:42,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771829660] [2021-12-18 19:59:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:42,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:43,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771829660] [2021-12-18 19:59:43,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771829660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042922867] [2021-12-18 19:59:43,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:59:43,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:43,331 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:43,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 19:59:46,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-18 19:59:46,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 247 conjunts are in the unsatisfiable core [2021-12-18 19:59:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:46,337 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:46,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:59:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:59:49,462 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-12-18 19:59:49,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-12-18 19:59:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 153 proven. 740 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:59:49,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:52,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:59:52,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 19:59:52,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 19:59:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 190 proven. 473 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:59:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042922867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:54,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:54,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 42, 42] total 129 [2021-12-18 19:59:54,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865229310] [2021-12-18 19:59:54,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:54,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-18 19:59:54,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-18 19:59:54,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=774, Invalid=15738, Unknown=0, NotChecked=0, Total=16512 [2021-12-18 19:59:54,454 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:01,513 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2021-12-18 20:00:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-18 20:00:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 0 states have call successors, (0), 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 187 [2021-12-18 20:00:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:01,514 INFO L225 Difference]: With dead ends: 295 [2021-12-18 20:00:01,514 INFO L226 Difference]: Without dead ends: 205 [2021-12-18 20:00:01,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7893 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2491, Invalid=40151, Unknown=0, NotChecked=0, Total=42642 [2021-12-18 20:00:01,516 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1103 mSDsluCounter, 4661 mSDsCounter, 0 mSdLazyCounter, 5264 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 5904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 5264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:01,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 4734 Invalid, 5904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 5264 Invalid, 0 Unknown, 562 Unchecked, 1.9s Time] [2021-12-18 20:00:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-18 20:00:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2021-12-18 20:00:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 1.020100502512563) internal successors, (203), 200 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2021-12-18 20:00:01,519 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 187 [2021-12-18 20:00:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2021-12-18 20:00:01,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2021-12-18 20:00:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 20:00:01,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:01,520 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:01,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:01,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-18 20:00:01,728 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:00:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 592508225, now seen corresponding path program 21 times [2021-12-18 20:00:01,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337036769] [2021-12-18 20:00:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:01,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:00:02,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337036769] [2021-12-18 20:00:02,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337036769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875502085] [2021-12-18 20:00:02,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:00:02,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:02,282 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 20:00:07,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 20:00:07,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-18 20:00:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:00:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:00:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:00:08,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:00:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:00:08,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:08,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2942 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2942) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0)) is different from false [2021-12-18 20:00:08,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:08,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:00:08,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:08,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:00:08,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:00:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:00:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875502085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:09,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:09,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 53 [2021-12-18 20:00:09,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131308607] [2021-12-18 20:00:09,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:09,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 20:00:09,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 20:00:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2513, Unknown=1, NotChecked=100, Total=2756 [2021-12-18 20:00:09,005 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 53 states, 53 states have (on average 4.339622641509434) internal successors, (230), 53 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:10,724 INFO L93 Difference]: Finished difference Result 352 states and 355 transitions. [2021-12-18 20:00:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 20:00:10,725 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.339622641509434) internal successors, (230), 53 states have internal predecessors, (230), 0 states have call successors, (0), 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 197 [2021-12-18 20:00:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:10,725 INFO L225 Difference]: With dead ends: 352 [2021-12-18 20:00:10,725 INFO L226 Difference]: Without dead ends: 208 [2021-12-18 20:00:10,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 369 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=5840, Unknown=1, NotChecked=154, Total=6320 [2021-12-18 20:00:10,726 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 142 mSDsluCounter, 2364 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:10,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 2433 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3114 Invalid, 0 Unknown, 243 Unchecked, 1.0s Time] [2021-12-18 20:00:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-18 20:00:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2021-12-18 20:00:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.019704433497537) internal successors, (207), 204 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-12-18 20:00:10,728 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 197 [2021-12-18 20:00:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:10,728 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-12-18 20:00:10,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.339622641509434) internal successors, (230), 53 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-12-18 20:00:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 20:00:10,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:10,729 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:10,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-18 20:00:10,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:10,935 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:00:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 882043972, now seen corresponding path program 22 times [2021-12-18 20:00:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802451715] [2021-12-18 20:00:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:10,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 190 proven. 626 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:00:11,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:11,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802451715] [2021-12-18 20:00:11,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802451715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:11,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811359615] [2021-12-18 20:00:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:11,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:11,353 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:11,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 20:00:11,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:11,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:11,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 194 conjunts are in the unsatisfiable core [2021-12-18 20:00:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:11,779 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:11,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:00:12,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:00:13,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:00:14,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:00:14,118 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-18 20:00:14,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-18 20:00:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 486 proven. 285 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:18,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2021-12-18 20:00:18,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-18 20:00:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:20,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811359615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:20,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:20,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 35, 46] total 106 [2021-12-18 20:00:20,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607746635] [2021-12-18 20:00:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:20,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-18 20:00:20,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-18 20:00:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=10326, Unknown=1, NotChecked=0, Total=11130 [2021-12-18 20:00:20,938 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 106 states, 106 states have (on average 4.367924528301887) internal successors, (463), 106 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:24,275 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2021-12-18 20:00:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-18 20:00:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 4.367924528301887) internal successors, (463), 106 states have internal predecessors, (463), 0 states have call successors, (0), 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 201 [2021-12-18 20:00:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:24,277 INFO L225 Difference]: With dead ends: 320 [2021-12-18 20:00:24,277 INFO L226 Difference]: Without dead ends: 222 [2021-12-18 20:00:24,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8150 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2832, Invalid=27967, Unknown=1, NotChecked=0, Total=30800 [2021-12-18 20:00:24,278 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 441 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 3053 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:24,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 3053 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1505 Invalid, 0 Unknown, 799 Unchecked, 0.5s Time] [2021-12-18 20:00:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-18 20:00:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2021-12-18 20:00:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 1.0187793427230047) internal successors, (217), 214 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-12-18 20:00:24,280 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 201 [2021-12-18 20:00:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:24,280 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-12-18 20:00:24,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 4.367924528301887) internal successors, (463), 106 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-12-18 20:00:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-18 20:00:24,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:24,282 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:24,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:24,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-18 20:00:24,495 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:00:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2029381736, now seen corresponding path program 18 times [2021-12-18 20:00:24,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368231232] [2021-12-18 20:00:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:24,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 190 proven. 650 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:25,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:25,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368231232] [2021-12-18 20:00:25,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368231232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:25,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805226087] [2021-12-18 20:00:25,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:00:25,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:25,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:25,006 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:25,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 20:00:29,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-18 20:00:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 20:00:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:29,357 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:00:29,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:00:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 231 proven. 609 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:30,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 276 proven. 564 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:32,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805226087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:32,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:32,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 89 [2021-12-18 20:00:32,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143752254] [2021-12-18 20:00:32,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:32,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-18 20:00:32,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-18 20:00:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1067, Invalid=6943, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 20:00:32,667 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 90 states, 89 states have (on average 5.404494382022472) internal successors, (481), 90 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:34,420 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-12-18 20:00:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 20:00:34,426 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 5.404494382022472) internal successors, (481), 90 states have internal predecessors, (481), 0 states have call successors, (0), 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 207 [2021-12-18 20:00:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:34,427 INFO L225 Difference]: With dead ends: 218 [2021-12-18 20:00:34,427 INFO L226 Difference]: Without dead ends: 218 [2021-12-18 20:00:34,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2778, Invalid=11028, Unknown=0, NotChecked=0, Total=13806 [2021-12-18 20:00:34,429 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1025 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:34,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1449 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:00:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-18 20:00:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-12-18 20:00:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-12-18 20:00:34,432 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2021-12-18 20:00:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:34,433 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-12-18 20:00:34,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 5.404494382022472) internal successors, (481), 90 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-12-18 20:00:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-18 20:00:34,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:34,434 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:34,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:34,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:34,659 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:00:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2090274185, now seen corresponding path program 23 times [2021-12-18 20:00:34,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928442106] [2021-12-18 20:00:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:34,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:35,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:35,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928442106] [2021-12-18 20:00:35,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928442106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:35,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389298720] [2021-12-18 20:00:35,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:00:35,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:35,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:35,316 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:35,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 20:00:39,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 20:00:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:39,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-18 20:00:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:39,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:00:40,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:00:40,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:00:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:00:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:40,895 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3291 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3291) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) 0)) is different from false [2021-12-18 20:00:40,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:40,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:00:40,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:00:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:00:40,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:00:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:41,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389298720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:41,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:41,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 56 [2021-12-18 20:00:41,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575421427] [2021-12-18 20:00:41,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:41,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 20:00:41,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 20:00:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2824, Unknown=1, NotChecked=106, Total=3080 [2021-12-18 20:00:41,469 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 56 states, 56 states have (on average 4.392857142857143) internal successors, (246), 56 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:43,345 INFO L93 Difference]: Finished difference Result 380 states and 383 transitions. [2021-12-18 20:00:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 20:00:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.392857142857143) internal successors, (246), 56 states have internal predecessors, (246), 0 states have call successors, (0), 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 213 [2021-12-18 20:00:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:43,352 INFO L225 Difference]: With dead ends: 380 [2021-12-18 20:00:43,352 INFO L226 Difference]: Without dead ends: 224 [2021-12-18 20:00:43,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 401 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=394, Invalid=6581, Unknown=1, NotChecked=164, Total=7140 [2021-12-18 20:00:43,353 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 246 mSDsluCounter, 2402 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:43,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 2476 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3206 Invalid, 0 Unknown, 214 Unchecked, 1.0s Time] [2021-12-18 20:00:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-18 20:00:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2021-12-18 20:00:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 220 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2021-12-18 20:00:43,355 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 213 [2021-12-18 20:00:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:43,355 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2021-12-18 20:00:43,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.392857142857143) internal successors, (246), 56 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2021-12-18 20:00:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-18 20:00:43,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:43,356 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:43,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:43,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:43,567 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:00:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1022845300, now seen corresponding path program 24 times [2021-12-18 20:00:43,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810297732] [2021-12-18 20:00:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:43,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 231 proven. 731 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:44,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810297732] [2021-12-18 20:00:44,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810297732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752405159] [2021-12-18 20:00:44,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:00:44,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:44,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:44,040 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:44,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-18 20:00:55,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 20:00:55,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-18 20:00:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 276 proven. 686 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:56,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:57,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 20:00:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 276 proven. 686 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:00:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752405159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:57,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:57,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 77 [2021-12-18 20:00:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939853948] [2021-12-18 20:00:57,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:57,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-18 20:00:57,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-18 20:00:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=5115, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 20:00:57,997 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 78 states, 77 states have (on average 5.857142857142857) internal successors, (451), 78 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:59,275 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2021-12-18 20:00:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 20:00:59,275 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 5.857142857142857) internal successors, (451), 78 states have internal predecessors, (451), 0 states have call successors, (0), 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 217 [2021-12-18 20:00:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:59,276 INFO L225 Difference]: With dead ends: 231 [2021-12-18 20:00:59,276 INFO L226 Difference]: Without dead ends: 231 [2021-12-18 20:00:59,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2406, Invalid=9150, Unknown=0, NotChecked=0, Total=11556 [2021-12-18 20:00:59,283 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 877 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:59,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 1088 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:00:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-18 20:00:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2021-12-18 20:00:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 226 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) [2021-12-18 20:00:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2021-12-18 20:00:59,288 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 217 [2021-12-18 20:00:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:59,289 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2021-12-18 20:00:59,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 5.857142857142857) internal successors, (451), 78 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:00:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2021-12-18 20:00:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-18 20:00:59,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:59,290 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:59,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:59,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-18 20:00:59,501 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:00:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 593177773, now seen corresponding path program 19 times [2021-12-18 20:00:59,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369407584] [2021-12-18 20:00:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:59,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 63 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:00,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369407584] [2021-12-18 20:01:00,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369407584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419790693] [2021-12-18 20:01:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:01:00,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:00,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:00,990 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:00,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-18 20:01:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:01,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 284 conjunts are in the unsatisfiable core [2021-12-18 20:01:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:02,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:02,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:01:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 63 proven. 1200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:02,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:05,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:05,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-18 20:01:05,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-18 20:01:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 63 proven. 876 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419790693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:05,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:05,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 48, 48] total 114 [2021-12-18 20:01:05,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053301691] [2021-12-18 20:01:05,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:05,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-18 20:01:05,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-18 20:01:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=12540, Unknown=0, NotChecked=0, Total=12882 [2021-12-18 20:01:05,476 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 114 states, 114 states have (on average 3.8859649122807016) internal successors, (443), 114 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:12,133 INFO L93 Difference]: Finished difference Result 343 states and 345 transitions. [2021-12-18 20:01:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 20:01:12,133 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.8859649122807016) internal successors, (443), 114 states have internal predecessors, (443), 0 states have call successors, (0), 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 219 [2021-12-18 20:01:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:12,134 INFO L225 Difference]: With dead ends: 343 [2021-12-18 20:01:12,134 INFO L226 Difference]: Without dead ends: 237 [2021-12-18 20:01:12,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 396 SyntacticMatches, 5 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4536 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1196, Invalid=24886, Unknown=0, NotChecked=0, Total=26082 [2021-12-18 20:01:12,135 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 779 mSDsluCounter, 5473 mSDsCounter, 0 mSdLazyCounter, 10740 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 5555 SdHoareTripleChecker+Invalid, 10974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 10740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:12,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 5555 Invalid, 10974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 10740 Invalid, 0 Unknown, 99 Unchecked, 3.5s Time] [2021-12-18 20:01:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-18 20:01:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2021-12-18 20:01:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.017467248908297) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-12-18 20:01:12,138 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 219 [2021-12-18 20:01:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:12,138 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-12-18 20:01:12,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.8859649122807016) internal successors, (443), 114 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-12-18 20:01:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-18 20:01:12,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:12,139 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:12,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:12,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-18 20:01:12,358 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:01:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -933666128, now seen corresponding path program 20 times [2021-12-18 20:01:12,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:12,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404568018] [2021-12-18 20:01:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:12,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 231 proven. 757 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:12,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404568018] [2021-12-18 20:01:12,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404568018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196530624] [2021-12-18 20:01:12,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:01:12,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:12,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:12,904 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:12,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-18 20:01:13,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:01:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-18 20:01:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 276 proven. 712 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:14,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 20:01:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 276 proven. 712 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196530624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:15,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:15,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 66 [2021-12-18 20:01:15,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778611288] [2021-12-18 20:01:15,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:15,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 20:01:15,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 20:01:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=4015, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:01:15,128 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 67 states, 66 states have (on average 5.333333333333333) internal successors, (352), 67 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:17,462 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2021-12-18 20:01:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 20:01:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 5.333333333333333) internal successors, (352), 67 states have internal predecessors, (352), 0 states have call successors, (0), 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 223 [2021-12-18 20:01:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:17,463 INFO L225 Difference]: With dead ends: 234 [2021-12-18 20:01:17,463 INFO L226 Difference]: Without dead ends: 234 [2021-12-18 20:01:17,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 409 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2298, Invalid=9474, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 20:01:17,464 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1355 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:17,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 1703 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 20:01:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-18 20:01:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-12-18 20:01:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 232 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2021-12-18 20:01:17,467 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 223 [2021-12-18 20:01:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:17,468 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2021-12-18 20:01:17,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 5.333333333333333) internal successors, (352), 67 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2021-12-18 20:01:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-18 20:01:17,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:17,469 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:17,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:17,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:17,683 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:01:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash 246919633, now seen corresponding path program 25 times [2021-12-18 20:01:17,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:17,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158032033] [2021-12-18 20:01:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:17,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:18,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158032033] [2021-12-18 20:01:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158032033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931751854] [2021-12-18 20:01:18,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:01:18,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:18,460 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:18,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-18 20:01:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-18 20:01:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:18,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:01:19,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:19,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:01:20,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:01:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:20,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:20,376 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3778 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3778) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 13)) 0)) is different from false [2021-12-18 20:01:20,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:01:20,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:20,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:01:20,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:01:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:21,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931751854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:21,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:21,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 60 [2021-12-18 20:01:21,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867004890] [2021-12-18 20:01:21,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:21,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 20:01:21,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 20:01:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3267, Unknown=1, NotChecked=114, Total=3540 [2021-12-18 20:01:21,041 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 60 states, 60 states have (on average 4.383333333333334) internal successors, (263), 60 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:23,401 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2021-12-18 20:01:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 20:01:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.383333333333334) internal successors, (263), 60 states have internal predecessors, (263), 0 states have call successors, (0), 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 229 [2021-12-18 20:01:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:23,402 INFO L225 Difference]: With dead ends: 408 [2021-12-18 20:01:23,402 INFO L226 Difference]: Without dead ends: 240 [2021-12-18 20:01:23,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 432 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=510, Invalid=7683, Unknown=1, NotChecked=178, Total=8372 [2021-12-18 20:01:23,407 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 445 mSDsluCounter, 3001 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 4348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 3080 Invalid, 4348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 4003 Invalid, 0 Unknown, 269 Unchecked, 1.3s Time] [2021-12-18 20:01:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-18 20:01:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-12-18 20:01:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 236 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) [2021-12-18 20:01:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2021-12-18 20:01:23,414 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 229 [2021-12-18 20:01:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:23,414 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2021-12-18 20:01:23,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.383333333333334) internal successors, (263), 60 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2021-12-18 20:01:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-18 20:01:23,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:23,415 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:23,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-18 20:01:23,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:23,625 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:01:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2078596308, now seen corresponding path program 26 times [2021-12-18 20:01:23,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:23,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656526035] [2021-12-18 20:01:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:23,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 276 proven. 844 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:24,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656526035] [2021-12-18 20:01:24,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656526035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071773884] [2021-12-18 20:01:24,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:01:24,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:24,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:24,191 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:24,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 20:01:24,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:01:24,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-18 20:01:24,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 325 proven. 795 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:25,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:26,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 20:01:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 325 proven. 795 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 20:01:26,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071773884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:26,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:26,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 68 [2021-12-18 20:01:26,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259412637] [2021-12-18 20:01:26,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:26,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 20:01:26,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 20:01:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=4151, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:01:26,461 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 69 states, 68 states have (on average 5.514705882352941) internal successors, (375), 69 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:01:27,844 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-12-18 20:01:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 20:01:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 5.514705882352941) internal successors, (375), 69 states have internal predecessors, (375), 0 states have call successors, (0), 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 233 [2021-12-18 20:01:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:01:27,845 INFO L225 Difference]: With dead ends: 247 [2021-12-18 20:01:27,845 INFO L226 Difference]: Without dead ends: 247 [2021-12-18 20:01:27,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 428 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1393, Invalid=6263, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 20:01:27,846 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1151 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:01:27,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1889 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 20:01:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-18 20:01:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2021-12-18 20:01:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 241 states have (on average 1.016597510373444) internal successors, (245), 242 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2021-12-18 20:01:27,848 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 233 [2021-12-18 20:01:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:01:27,848 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2021-12-18 20:01:27,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 5.514705882352941) internal successors, (375), 69 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:01:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2021-12-18 20:01:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-18 20:01:27,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:01:27,849 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:01:27,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 20:01:28,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-18 20:01:28,059 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:01:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:01:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash 371259637, now seen corresponding path program 21 times [2021-12-18 20:01:28,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:01:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008022404] [2021-12-18 20:01:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:01:28,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:01:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:01:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 68 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:01:29,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:01:29,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008022404] [2021-12-18 20:01:29,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008022404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:01:29,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745949025] [2021-12-18 20:01:29,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:01:29,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:01:29,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:01:29,701 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:01:29,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-18 20:01:43,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-18 20:01:43,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:01:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 255 conjunts are in the unsatisfiable core [2021-12-18 20:01:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:01:43,840 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:01:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:01:45,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:01:48,241 INFO L354 Elim1Store]: treesize reduction 14, result has 62.2 percent of original size [2021-12-18 20:01:48,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-12-18 20:01:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 276 proven. 1196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:01:48,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:01:51,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-18 20:01:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-18 20:01:51,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:01:51,530 INFO L388 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 54 treesize of output 54 [2021-12-18 20:01:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 325 proven. 770 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-18 20:01:53,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745949025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:01:53,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:01:53,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 51, 38] total 143 [2021-12-18 20:01:53,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866334930] [2021-12-18 20:01:53,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:01:53,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-12-18 20:01:53,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:01:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-12-18 20:01:53,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=19391, Unknown=0, NotChecked=0, Total=20306 [2021-12-18 20:01:53,841 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 143 states, 143 states have (on average 4.510489510489511) internal successors, (645), 143 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:02,755 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2021-12-18 20:02:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-18 20:02:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 4.510489510489511) internal successors, (645), 143 states have internal predecessors, (645), 0 states have call successors, (0), 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 235 [2021-12-18 20:02:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:02,757 INFO L225 Difference]: With dead ends: 366 [2021-12-18 20:02:02,757 INFO L226 Difference]: Without dead ends: 252 [2021-12-18 20:02:02,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 445 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10629 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=2951, Invalid=53931, Unknown=0, NotChecked=0, Total=56882 [2021-12-18 20:02:02,759 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 775 mSDsluCounter, 5973 mSDsCounter, 0 mSdLazyCounter, 5364 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 6063 SdHoareTripleChecker+Invalid, 7476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2025 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:02,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 6063 Invalid, 7476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5364 Invalid, 0 Unknown, 2025 Unchecked, 1.8s Time] [2021-12-18 20:02:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-18 20:02:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-12-18 20:02:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 248 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2021-12-18 20:02:02,761 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 235 [2021-12-18 20:02:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:02,761 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2021-12-18 20:02:02,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 4.510489510489511) internal successors, (645), 143 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2021-12-18 20:02:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-18 20:02:02,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:02,762 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:02,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:02,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:02,977 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:02:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2100370919, now seen corresponding path program 27 times [2021-12-18 20:02:02,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:02,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005910779] [2021-12-18 20:02:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:02,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-18 20:02:03,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005910779] [2021-12-18 20:02:03,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005910779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424341288] [2021-12-18 20:02:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:02:03,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:03,755 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:03,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-18 20:02:17,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-18 20:02:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 20:02:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:17,722 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:02:17,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:02:17,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:02:18,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:02:18,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 20:02:20,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-18 20:02:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-12-18 20:02:20,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:22,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:22,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:02:22,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:22,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:02:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:02:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-12-18 20:02:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424341288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:23,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:23,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 8, 8] total 51 [2021-12-18 20:02:23,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225260351] [2021-12-18 20:02:23,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:23,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 20:02:23,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 20:02:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2411, Unknown=21, NotChecked=0, Total=2550 [2021-12-18 20:02:23,570 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 51 states, 51 states have (on average 4.96078431372549) internal successors, (253), 51 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:26,895 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2021-12-18 20:02:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-18 20:02:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.96078431372549) internal successors, (253), 51 states have internal predecessors, (253), 0 states have call successors, (0), 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 245 [2021-12-18 20:02:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:26,896 INFO L225 Difference]: With dead ends: 435 [2021-12-18 20:02:26,896 INFO L226 Difference]: Without dead ends: 255 [2021-12-18 20:02:26,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=779, Invalid=16492, Unknown=21, NotChecked=0, Total=17292 [2021-12-18 20:02:26,897 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 31 mSDsluCounter, 2630 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2698 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:26,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2698 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1660 Invalid, 0 Unknown, 259 Unchecked, 0.5s Time] [2021-12-18 20:02:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-18 20:02:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2021-12-18 20:02:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0119521912350598) internal successors, (254), 251 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2021-12-18 20:02:26,899 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 245 [2021-12-18 20:02:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:26,899 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2021-12-18 20:02:26,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.96078431372549) internal successors, (253), 51 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2021-12-18 20:02:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-18 20:02:26,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:26,900 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:26,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:27,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:27,114 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:02:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:27,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1844859197, now seen corresponding path program 22 times [2021-12-18 20:02:27,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:27,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467537385] [2021-12-18 20:02:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:27,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 73 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:02:28,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467537385] [2021-12-18 20:02:28,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467537385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713047224] [2021-12-18 20:02:28,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:02:28,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:28,837 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-18 20:02:29,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:02:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:02:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 239 conjunts are in the unsatisfiable core [2021-12-18 20:02:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:02:29,760 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:02:29,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:02:31,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:02:33,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:02:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:02:33,597 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-18 20:02:33,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-18 20:02:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 816 proven. 447 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-18 20:02:33,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:02:40,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:02:40,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 99 [2021-12-18 20:02:40,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-18 20:02:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 73 proven. 1190 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-18 20:02:42,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713047224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:02:42,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:02:42,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 41, 55] total 148 [2021-12-18 20:02:42,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5756641] [2021-12-18 20:02:42,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:02:42,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-12-18 20:02:42,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:02:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-12-18 20:02:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=20597, Unknown=3, NotChecked=0, Total=21756 [2021-12-18 20:02:42,953 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand has 148 states, 148 states have (on average 4.1891891891891895) internal successors, (620), 148 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:02:50,040 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2021-12-18 20:02:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-18 20:02:50,041 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 4.1891891891891895) internal successors, (620), 148 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-12-18 20:02:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:02:50,041 INFO L225 Difference]: With dead ends: 384 [2021-12-18 20:02:50,041 INFO L226 Difference]: Without dead ends: 262 [2021-12-18 20:02:50,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 465 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13972 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=3282, Invalid=51237, Unknown=3, NotChecked=0, Total=54522 [2021-12-18 20:02:50,044 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 742 mSDsluCounter, 5805 mSDsCounter, 0 mSdLazyCounter, 5108 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 5885 SdHoareTripleChecker+Invalid, 6707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 5108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1503 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:02:50,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 5885 Invalid, 6707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 5108 Invalid, 0 Unknown, 1503 Unchecked, 1.7s Time] [2021-12-18 20:02:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-18 20:02:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2021-12-18 20:02:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.011764705882353) internal successors, (258), 255 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2021-12-18 20:02:50,047 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 251 [2021-12-18 20:02:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:02:50,047 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2021-12-18 20:02:50,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 4.1891891891891895) internal successors, (620), 148 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:02:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2021-12-18 20:02:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-18 20:02:50,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:02:50,048 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:02:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-18 20:02:50,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:50,270 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:02:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:02:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1012204736, now seen corresponding path program 23 times [2021-12-18 20:02:50,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:02:50,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429420271] [2021-12-18 20:02:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:02:50,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:02:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:02:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 325 proven. 995 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-18 20:02:50,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:02:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429420271] [2021-12-18 20:02:50,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429420271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:02:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695184728] [2021-12-18 20:02:50,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:02:50,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:02:50,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:02:50,930 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:02:50,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-18 20:03:08,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-18 20:03:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:03:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-18 20:03:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:03:08,608 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:03:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:03:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 378 proven. 942 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-18 20:03:10,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:03:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 435 proven. 885 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-18 20:03:12,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695184728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:03:12,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:03:12,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 103 [2021-12-18 20:03:12,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929438446] [2021-12-18 20:03:12,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:03:12,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 20:03:12,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:03:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 20:03:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=9425, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 20:03:12,722 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand has 104 states, 103 states have (on average 5.689320388349515) internal successors, (586), 104 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:03:14,596 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2021-12-18 20:03:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 20:03:14,597 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 5.689320388349515) internal successors, (586), 104 states have internal predecessors, (586), 0 states have call successors, (0), 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 255 [2021-12-18 20:03:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:03:14,597 INFO L225 Difference]: With dead ends: 265 [2021-12-18 20:03:14,597 INFO L226 Difference]: Without dead ends: 265 [2021-12-18 20:03:14,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5696 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3456, Invalid=15450, Unknown=0, NotChecked=0, Total=18906 [2021-12-18 20:03:14,598 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 911 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 3349 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:03:14,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 2341 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3349 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:03:14,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-18 20:03:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2021-12-18 20:03:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2021-12-18 20:03:14,600 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 255 [2021-12-18 20:03:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:03:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2021-12-18 20:03:14,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 5.689320388349515) internal successors, (586), 104 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:03:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2021-12-18 20:03:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-18 20:03:14,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:03:14,602 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:03:14,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-18 20:03:14,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:14,802 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:03:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:03:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1649052482, now seen corresponding path program 24 times [2021-12-18 20:03:14,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:03:14,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880681101] [2021-12-18 20:03:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:03:14,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:03:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:03:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 932 proven. 511 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-18 20:03:15,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:03:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880681101] [2021-12-18 20:03:15,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880681101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:03:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877231605] [2021-12-18 20:03:15,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:03:15,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:03:15,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:03:15,321 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:03:15,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-18 20:04:12,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-18 20:04:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 20:04:12,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:12,544 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:12,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:12,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:04:13,398 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-12-18 20:04:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 36 [2021-12-18 20:04:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 60 proven. 93 refuted. 0 times theorem prover too weak. 1725 trivial. 0 not checked. [2021-12-18 20:04:13,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:18,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:18,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-18 20:04:18,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-18 20:04:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 414 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2021-12-18 20:04:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877231605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:19,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:19,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11, 12] total 58 [2021-12-18 20:04:19,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397275346] [2021-12-18 20:04:19,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:19,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 20:04:19,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 20:04:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2916, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 20:04:19,083 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 58 states, 58 states have (on average 4.931034482758621) internal successors, (286), 58 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:25,009 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2021-12-18 20:04:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-18 20:04:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.931034482758621) internal successors, (286), 58 states have internal predecessors, (286), 0 states have call successors, (0), 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 263 [2021-12-18 20:04:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:25,009 INFO L225 Difference]: With dead ends: 465 [2021-12-18 20:04:25,009 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 20:04:25,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 490 SyntacticMatches, 17 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9536 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5393, Invalid=28279, Unknown=0, NotChecked=0, Total=33672 [2021-12-18 20:04:25,011 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 145 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:25,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 520 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1257 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2021-12-18 20:04:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 20:04:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 20:04:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 20:04:25,011 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2021-12-18 20:04:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:25,011 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 20:04:25,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.931034482758621) internal successors, (286), 58 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 20:04:25,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 20:04:25,013 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-12-18 20:04:25,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-18 20:04:25,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-12-18 20:04:25,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:25,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-18 20:04:25,232 INFO L732 BasicCegarLoop]: Path program histogram: [27, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:25,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 20:04:25,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 08:04:25 BoogieIcfgContainer [2021-12-18 20:04:25,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 20:04:25,236 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 20:04:25,236 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 20:04:25,236 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 20:04:25,237 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:56:19" (3/4) ... [2021-12-18 20:04:25,239 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-18 20:04:25,247 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-12-18 20:04:25,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-18 20:04:25,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-18 20:04:25,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-18 20:04:25,279 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 20:04:25,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 20:04:25,280 INFO L158 Benchmark]: Toolchain (without parser) took 486408.98ms. Allocated memory was 86.0MB in the beginning and 262.1MB in the end (delta: 176.2MB). Free memory was 55.2MB in the beginning and 81.8MB in the end (delta: -26.7MB). Peak memory consumption was 147.9MB. Max. memory is 16.1GB. [2021-12-18 20:04:25,280 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory was 43.4MB in the beginning and 43.3MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:04:25,281 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.09ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 54.9MB in the beginning and 95.2MB in the end (delta: -40.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 20:04:25,281 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.27ms. Allocated memory is still 123.7MB. Free memory was 95.2MB in the beginning and 93.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:04:25,282 INFO L158 Benchmark]: Boogie Preprocessor took 45.63ms. Allocated memory is still 123.7MB. Free memory was 93.1MB in the beginning and 91.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:04:25,282 INFO L158 Benchmark]: RCFGBuilder took 263.95ms. Allocated memory is still 123.7MB. Free memory was 91.8MB in the beginning and 78.5MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 20:04:25,282 INFO L158 Benchmark]: TraceAbstraction took 485677.03ms. Allocated memory was 123.7MB in the beginning and 262.1MB in the end (delta: 138.4MB). Free memory was 77.7MB in the beginning and 85.0MB in the end (delta: -7.3MB). Peak memory consumption was 133.7MB. Max. memory is 16.1GB. [2021-12-18 20:04:25,282 INFO L158 Benchmark]: Witness Printer took 43.36ms. Allocated memory is still 262.1MB. Free memory was 85.0MB in the beginning and 81.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:04:25,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory was 43.4MB in the beginning and 43.3MB in the end (delta: 42.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.09ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 54.9MB in the beginning and 95.2MB in the end (delta: -40.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.27ms. Allocated memory is still 123.7MB. Free memory was 95.2MB in the beginning and 93.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.63ms. Allocated memory is still 123.7MB. Free memory was 93.1MB in the beginning and 91.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 263.95ms. Allocated memory is still 123.7MB. Free memory was 91.8MB in the beginning and 78.5MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 485677.03ms. Allocated memory was 123.7MB in the beginning and 262.1MB in the end (delta: 138.4MB). Free memory was 77.7MB in the beginning and 85.0MB in the end (delta: -7.3MB). Peak memory consumption was 133.7MB. Max. memory is 16.1GB. * Witness Printer took 43.36ms. Allocated memory is still 262.1MB. Free memory was 85.0MB in the beginning and 81.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 485.6s, OverallIterations: 78, TraceHistogramMax: 17, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 100.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25289 SdHoareTripleChecker+Valid, 35.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25289 mSDsluCounter, 83289 SdHoareTripleChecker+Invalid, 29.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11550 IncrementalHoareTripleChecker+Unchecked, 79747 mSDsCounter, 3787 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 103096 IncrementalHoareTripleChecker+Invalid, 118433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3787 mSolverCounterUnsat, 3542 mSDtfsCounter, 103096 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18332 GetRequests, 13458 SyntacticMatches, 147 SemanticMatches, 4727 ConstructedPredicates, 22 IntricatePredicates, 20 DeprecatedPredicates, 116940 ImplicationChecksByTransitivity, 213.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=264occurred in iteration=77, InterpolantAutomatonStates: 2337, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 78 MinimizatonAttempts, 618 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 144.3s SatisfiabilityAnalysisTime, 221.7s InterpolantComputationTime, 15415 NumberOfCodeBlocks, 15383 NumberOfCodeBlocksAsserted, 378 NumberOfCheckSat, 22728 ConstructedInterpolants, 1565 QuantifiedInterpolants, 265163 SizeOfPredicates, 1745 NumberOfNonLiveVariables, 35333 ConjunctsInSsa, 5962 ConjunctsInUnsatCore, 191 InterpolantComputations, 22 PerfectInterpolantSequences, 37372/97266 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-18 20:04:25,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE