./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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_cstrspn-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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:46:12,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:46:12,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:46:12,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:46:12,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:46:12,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:46:12,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:46:12,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:46:12,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:46:12,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:46:12,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:46:12,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:46:12,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:46:12,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:46:12,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:46:12,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:46:12,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:46:12,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:46:12,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:46:12,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:46:12,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:46:12,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:46:12,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:46:12,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:46:12,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:46:12,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:46:12,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:46:12,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:46:12,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:46:12,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:46:12,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:46:12,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:46:12,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:46:12,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:46:12,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:46:12,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:46:12,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:46:12,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:46:12,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:46:12,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:46:12,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:46:12,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:46:12,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:46:12,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:46:12,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:46:12,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:46:12,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:46:12,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:46:12,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:46:12,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:46:12,371 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:46:12,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:46:12,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:46:12,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:46:12,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:46:12,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:46:12,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:46:12,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:46:12,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:46:12,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:46:12,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:46:12,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:46:12,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:46:12,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:46:12,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:46:12,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-12-28 05:46:12,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:46:12,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:46:12,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:46:12,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:46:12,637 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:46:12,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-28 05:46:12,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6acb7cf/ab25339d1f70453d987fc8ec6a172939/FLAGf67c909fc [2021-12-28 05:46:13,045 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:46:13,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-28 05:46:13,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6acb7cf/ab25339d1f70453d987fc8ec6a172939/FLAGf67c909fc [2021-12-28 05:46:13,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6acb7cf/ab25339d1f70453d987fc8ec6a172939 [2021-12-28 05:46:13,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:46:13,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:46:13,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:46:13,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:46:13,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:46:13,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bacdcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13, skipping insertion in model container [2021-12-28 05:46:13,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:46:13,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:46:13,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:46:13,696 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:46:13,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:46:13,732 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:46:13,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13 WrapperNode [2021-12-28 05:46:13,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:46:13,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:46:13,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:46:13,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:46:13,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,759 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-12-28 05:46:13,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:46:13,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:46:13,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:46:13,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:46:13,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:46:13,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:46:13,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:46:13,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:46:13,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (1/1) ... [2021-12-28 05:46:13,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:46:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:13,797 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) [2021-12-28 05:46:13,810 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 [2021-12-28 05:46:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:46:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:46:13,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:46:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:46:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:46:13,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:46:13,915 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:46:13,917 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:46:14,097 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:46:14,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:46:14,115 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 05:46:14,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:46:14 BoogieIcfgContainer [2021-12-28 05:46:14,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:46:14,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:46:14,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:46:14,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:46:14,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:46:13" (1/3) ... [2021-12-28 05:46:14,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8c8e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:46:14, skipping insertion in model container [2021-12-28 05:46:14,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:46:13" (2/3) ... [2021-12-28 05:46:14,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8c8e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:46:14, skipping insertion in model container [2021-12-28 05:46:14,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:46:14" (3/3) ... [2021-12-28 05:46:14,122 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-12-28 05:46:14,130 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:46:14,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-28 05:46:14,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:46:14,171 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 [2021-12-28 05:46:14,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-28 05:46:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:46:14,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:14,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:14,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-28 05:46:14,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:14,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103200367] [2021-12-28 05:46:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:14,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:14,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:14,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103200367] [2021-12-28 05:46:14,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103200367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:14,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:14,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:46:14,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083803775] [2021-12-28 05:46:14,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:14,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:46:14,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:46:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:14,363 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-12-28 05:46:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:14,413 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-12-28 05:46:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:46:14,426 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 [2021-12-28 05:46:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:14,433 INFO L225 Difference]: With dead ends: 78 [2021-12-28 05:46:14,433 INFO L226 Difference]: Without dead ends: 74 [2021-12-28 05:46:14,434 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 [2021-12-28 05:46:14,437 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 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 [2021-12-28 05:46:14,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-28 05:46:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-12-28 05:46:14,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 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) [2021-12-28 05:46:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-28 05:46:14,472 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-12-28 05:46:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:14,473 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-28 05:46:14,473 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) [2021-12-28 05:46:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-28 05:46:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:46:14,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:14,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:46:14,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-28 05:46:14,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184843] [2021-12-28 05:46:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:14,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:14,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184843] [2021-12-28 05:46:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:14,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:14,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:46:14,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123327616] [2021-12-28 05:46:14,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:14,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:46:14,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:14,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:46:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:46:14,555 INFO L87 Difference]: Start difference. First operand 44 states and 50 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) [2021-12-28 05:46:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:14,583 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-28 05:46:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:46:14,584 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 [2021-12-28 05:46:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:14,586 INFO L225 Difference]: With dead ends: 42 [2021-12-28 05:46:14,586 INFO L226 Difference]: Without dead ends: 42 [2021-12-28 05:46:14,586 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 [2021-12-28 05:46:14,590 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:14,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-28 05:46:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-28 05:46:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 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) [2021-12-28 05:46:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-28 05:46:14,599 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-28 05:46:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:14,600 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-28 05:46:14,600 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) [2021-12-28 05:46:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-28 05:46:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:46:14,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:14,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:14,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:46:14,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-28 05:46:14,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:14,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324852644] [2021-12-28 05:46:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:14,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:14,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:14,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324852644] [2021-12-28 05:46:14,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324852644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:14,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:14,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:46:14,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942839200] [2021-12-28 05:46:14,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:14,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:46:14,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:46:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:14,690 INFO L87 Difference]: Start difference. First operand 42 states and 48 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) [2021-12-28 05:46:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:14,755 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-12-28 05:46:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:46:14,755 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 [2021-12-28 05:46:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:14,757 INFO L225 Difference]: With dead ends: 75 [2021-12-28 05:46:14,757 INFO L226 Difference]: Without dead ends: 75 [2021-12-28 05:46:14,757 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 [2021-12-28 05:46:14,762 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:14,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-28 05:46:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-12-28 05:46:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-28 05:46:14,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-12-28 05:46:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:14,772 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-28 05:46:14,772 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) [2021-12-28 05:46:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-28 05:46:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:46:14,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:14,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:14,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:46:14,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-28 05:46:14,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:14,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794866050] [2021-12-28 05:46:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:14,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:14,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794866050] [2021-12-28 05:46:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794866050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:14,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:14,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:46:14,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411179094] [2021-12-28 05:46:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:14,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:46:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:46:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:46:14,874 INFO L87 Difference]: Start difference. First operand 44 states and 51 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) [2021-12-28 05:46:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:14,960 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-12-28 05:46:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:46:14,961 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 [2021-12-28 05:46:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:14,963 INFO L225 Difference]: With dead ends: 72 [2021-12-28 05:46:14,963 INFO L226 Difference]: Without dead ends: 72 [2021-12-28 05:46:14,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:46:14,964 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:14,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 121 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-28 05:46:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-12-28 05:46:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 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) [2021-12-28 05:46:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-28 05:46:14,967 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 9 [2021-12-28 05:46:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:14,967 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-28 05:46:14,967 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) [2021-12-28 05:46:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-28 05:46:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:46:14,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:14,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:14,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:46:14,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-28 05:46:14,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:14,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881368612] [2021-12-28 05:46:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:14,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:14,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881368612] [2021-12-28 05:46:14,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881368612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:14,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:14,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:46:14,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983200531] [2021-12-28 05:46:14,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:14,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:46:14,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:46:14,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:14,996 INFO L87 Difference]: Start difference. First operand 50 states and 60 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) [2021-12-28 05:46:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:15,013 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-12-28 05:46:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:46:15,013 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 [2021-12-28 05:46:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:15,014 INFO L225 Difference]: With dead ends: 87 [2021-12-28 05:46:15,014 INFO L226 Difference]: Without dead ends: 87 [2021-12-28 05:46:15,014 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 [2021-12-28 05:46:15,015 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 108 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 [2021-12-28 05:46:15,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 108 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-28 05:46:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-12-28 05:46:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-28 05:46:15,021 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2021-12-28 05:46:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:15,021 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-28 05:46:15,021 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) [2021-12-28 05:46:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-28 05:46:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:46:15,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:15,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:15,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 05:46:15,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-28 05:46:15,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:15,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667552112] [2021-12-28 05:46:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:15,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:15,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667552112] [2021-12-28 05:46:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667552112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:15,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:15,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:46:15,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854843668] [2021-12-28 05:46:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:15,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:46:15,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:46:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:46:15,073 INFO L87 Difference]: Start difference. First operand 63 states and 76 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) [2021-12-28 05:46:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:15,093 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-12-28 05:46:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:46:15,094 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 [2021-12-28 05:46:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:15,094 INFO L225 Difference]: With dead ends: 61 [2021-12-28 05:46:15,094 INFO L226 Difference]: Without dead ends: 61 [2021-12-28 05:46:15,095 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 [2021-12-28 05:46:15,095 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:15,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-28 05:46:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-28 05:46:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 60 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) [2021-12-28 05:46:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-28 05:46:15,098 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2021-12-28 05:46:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:15,098 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-28 05:46:15,099 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) [2021-12-28 05:46:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-28 05:46:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:46:15,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:15,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:15,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:46:15,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-28 05:46:15,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:15,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820673844] [2021-12-28 05:46:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:15,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:15,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820673844] [2021-12-28 05:46:15,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820673844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:15,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:15,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:46:15,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634434538] [2021-12-28 05:46:15,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:15,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:46:15,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:46:15,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:46:15,144 INFO L87 Difference]: Start difference. First operand 61 states and 73 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) [2021-12-28 05:46:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:15,187 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-12-28 05:46:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:46:15,188 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 [2021-12-28 05:46:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:15,188 INFO L225 Difference]: With dead ends: 91 [2021-12-28 05:46:15,188 INFO L226 Difference]: Without dead ends: 91 [2021-12-28 05:46:15,189 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 [2021-12-28 05:46:15,189 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:15,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-28 05:46:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-12-28 05:46:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 64 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) [2021-12-28 05:46:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2021-12-28 05:46:15,192 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 9 [2021-12-28 05:46:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:15,192 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2021-12-28 05:46:15,193 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) [2021-12-28 05:46:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2021-12-28 05:46:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:46:15,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:15,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:15,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 05:46:15,194 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2021-12-28 05:46:15,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:15,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197560647] [2021-12-28 05:46:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:15,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:15,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197560647] [2021-12-28 05:46:15,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197560647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:15,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:15,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:46:15,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64905548] [2021-12-28 05:46:15,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:15,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:46:15,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:46:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:15,228 INFO L87 Difference]: Start difference. First operand 65 states and 79 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) [2021-12-28 05:46:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:15,254 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-12-28 05:46:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:46:15,254 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 [2021-12-28 05:46:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:15,255 INFO L225 Difference]: With dead ends: 64 [2021-12-28 05:46:15,255 INFO L226 Difference]: Without dead ends: 64 [2021-12-28 05:46:15,255 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 [2021-12-28 05:46:15,255 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:15,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-28 05:46:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-12-28 05:46:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-12-28 05:46:15,258 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-12-28 05:46:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:15,258 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-12-28 05:46:15,258 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) [2021-12-28 05:46:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-12-28 05:46:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:46:15,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:15,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:15,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:46:15,259 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-28 05:46:15,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671774623] [2021-12-28 05:46:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:15,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671774623] [2021-12-28 05:46:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671774623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:15,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:15,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:46:15,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239297564] [2021-12-28 05:46:15,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:15,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:46:15,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:46:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:15,289 INFO L87 Difference]: Start difference. First operand 54 states and 65 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) [2021-12-28 05:46:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:15,305 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-12-28 05:46:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:46:15,305 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 [2021-12-28 05:46:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:15,305 INFO L225 Difference]: With dead ends: 53 [2021-12-28 05:46:15,306 INFO L226 Difference]: Without dead ends: 53 [2021-12-28 05:46:15,306 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 [2021-12-28 05:46:15,306 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:15,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-28 05:46:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-28 05:46:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 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) [2021-12-28 05:46:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-28 05:46:15,309 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-12-28 05:46:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:15,309 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-28 05:46:15,309 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) [2021-12-28 05:46:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-28 05:46:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:46:15,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:15,310 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:15,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 05:46:15,310 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-28 05:46:15,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:15,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315045610] [2021-12-28 05:46:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:15,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:15,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315045610] [2021-12-28 05:46:15,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315045610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:15,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630274679] [2021-12-28 05:46:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:15,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:15,372 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) [2021-12-28 05:46:15,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:46:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 05:46:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:46:15,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:46:15,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630274679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:15,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:15,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-28 05:46:15,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865014543] [2021-12-28 05:46:15,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:15,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:46:15,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:46:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:46:15,683 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:15,785 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-28 05:46:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:46:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:46:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:15,786 INFO L225 Difference]: With dead ends: 116 [2021-12-28 05:46:15,786 INFO L226 Difference]: Without dead ends: 116 [2021-12-28 05:46:15,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:46:15,787 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 144 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:15,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 191 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:46:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-28 05:46:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-12-28 05:46:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 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) [2021-12-28 05:46:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-28 05:46:15,789 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-12-28 05:46:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:15,789 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-28 05:46:15,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-28 05:46:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:46:15,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:15,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:15,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 05:46:16,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 05:46:16,007 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-12-28 05:46:16,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640498144] [2021-12-28 05:46:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:16,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640498144] [2021-12-28 05:46:16,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640498144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:16,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:16,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:46:16,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41305294] [2021-12-28 05:46:16,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:16,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:46:16,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:46:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:46:16,051 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2021-12-28 05:46:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:16,079 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-28 05:46:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:46:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 [2021-12-28 05:46:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:16,080 INFO L225 Difference]: With dead ends: 47 [2021-12-28 05:46:16,080 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 05:46:16,080 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 [2021-12-28 05:46:16,081 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:16,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 05:46:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-28 05:46:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 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) [2021-12-28 05:46:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-28 05:46:16,083 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-12-28 05:46:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:16,084 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-28 05:46:16,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2021-12-28 05:46:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-28 05:46:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:46:16,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:16,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:16,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 05:46:16,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-12-28 05:46:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:16,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830453399] [2021-12-28 05:46:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:16,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830453399] [2021-12-28 05:46:16,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830453399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:16,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:16,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:46:16,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67605439] [2021-12-28 05:46:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:16,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:46:16,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:46:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:46:16,158 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:16,215 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-28 05:46:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:46:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:46:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:16,216 INFO L225 Difference]: With dead ends: 50 [2021-12-28 05:46:16,216 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 05:46:16,216 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 [2021-12-28 05:46:16,217 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:16,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 78 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 05:46:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-28 05:46:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 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) [2021-12-28 05:46:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-28 05:46:16,221 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-28 05:46:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:16,221 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-28 05:46:16,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-28 05:46:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:46:16,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:16,222 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:16,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 05:46:16,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-28 05:46:16,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:16,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175843103] [2021-12-28 05:46:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:16,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175843103] [2021-12-28 05:46:16,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175843103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:16,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395452057] [2021-12-28 05:46:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:16,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:16,288 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) [2021-12-28 05:46:16,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:46:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:16,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:46:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:16,350 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:46:16,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:46:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395452057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:16,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:16,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-28 05:46:16,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181561577] [2021-12-28 05:46:16,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:16,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:46:16,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:46:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:46:16,549 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:16,656 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-28 05:46:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:46:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:46:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:16,658 INFO L225 Difference]: With dead ends: 91 [2021-12-28 05:46:16,658 INFO L226 Difference]: Without dead ends: 91 [2021-12-28 05:46:16,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:46:16,659 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:16,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 173 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:46:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-28 05:46:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-12-28 05:46:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-28 05:46:16,661 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-28 05:46:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:16,661 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-28 05:46:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-28 05:46:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 05:46:16,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:16,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:16,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 05:46:16,881 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,SelfDestructingSolverStorable12 [2021-12-28 05:46:16,881 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-12-28 05:46:16,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:16,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802955124] [2021-12-28 05:46:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802955124] [2021-12-28 05:46:16,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802955124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:16,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:16,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:46:16,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884326013] [2021-12-28 05:46:16,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:16,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:46:16,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:46:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:46:16,910 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:16,949 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-28 05:46:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:46:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-28 05:46:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:16,950 INFO L225 Difference]: With dead ends: 46 [2021-12-28 05:46:16,950 INFO L226 Difference]: Without dead ends: 46 [2021-12-28 05:46:16,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:46:16,951 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:16,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-28 05:46:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-28 05:46:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 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) [2021-12-28 05:46:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-28 05:46:16,952 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-12-28 05:46:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:16,952 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-28 05:46:16,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-28 05:46:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 05:46:16,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:16,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:16,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 05:46:16,953 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-12-28 05:46:16,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128848254] [2021-12-28 05:46:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128848254] [2021-12-28 05:46:17,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128848254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:17,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:17,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:46:17,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176789440] [2021-12-28 05:46:17,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:17,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:46:17,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:17,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:46:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:46:17,013 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:17,072 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-28 05:46:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:46:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-28 05:46:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:17,073 INFO L225 Difference]: With dead ends: 49 [2021-12-28 05:46:17,073 INFO L226 Difference]: Without dead ends: 49 [2021-12-28 05:46:17,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:46:17,074 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:17,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-28 05:46:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-12-28 05:46:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-28 05:46:17,076 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-12-28 05:46:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:17,076 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-28 05:46:17,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-28 05:46:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:46:17,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:17,077 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] [2021-12-28 05:46:17,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 05:46:17,077 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-12-28 05:46:17,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261037763] [2021-12-28 05:46:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:17,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:17,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261037763] [2021-12-28 05:46:17,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261037763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:17,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:17,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:46:17,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277030137] [2021-12-28 05:46:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:17,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:46:17,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:46:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:17,134 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:17,144 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-28 05:46:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:46:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-28 05:46:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:17,145 INFO L225 Difference]: With dead ends: 46 [2021-12-28 05:46:17,145 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 05:46:17,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:46:17,146 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:17,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 05:46:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-28 05:46:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 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) [2021-12-28 05:46:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-28 05:46:17,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-12-28 05:46:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:17,148 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-28 05:46:17,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-28 05:46:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:46:17,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:17,148 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:17,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 05:46:17,149 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-12-28 05:46:17,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:17,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117287981] [2021-12-28 05:46:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:17,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117287981] [2021-12-28 05:46:17,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117287981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:17,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:17,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 05:46:17,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053674027] [2021-12-28 05:46:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:17,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:46:17,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:46:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:46:17,227 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-12-28 05:46:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:17,330 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-28 05:46:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:46:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 [2021-12-28 05:46:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:17,337 INFO L225 Difference]: With dead ends: 53 [2021-12-28 05:46:17,337 INFO L226 Difference]: Without dead ends: 34 [2021-12-28 05:46:17,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:46:17,338 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:17,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-28 05:46:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-28 05:46:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-28 05:46:17,340 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-12-28 05:46:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:17,340 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-28 05:46:17,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-12-28 05:46:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-28 05:46:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:46:17,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:17,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:17,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 05:46:17,341 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-12-28 05:46:17,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:17,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62177153] [2021-12-28 05:46:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:17,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62177153] [2021-12-28 05:46:17,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62177153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:17,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:17,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 05:46:17,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697263152] [2021-12-28 05:46:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:17,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:46:17,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:17,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:46:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:46:17,452 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-12-28 05:46:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:17,566 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-28 05:46:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:46:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 [2021-12-28 05:46:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:17,566 INFO L225 Difference]: With dead ends: 48 [2021-12-28 05:46:17,567 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 05:46:17,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:46:17,567 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:17,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 150 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:46:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 05:46:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-28 05:46:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-28 05:46:17,569 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-12-28 05:46:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:17,569 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-28 05:46:17,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-12-28 05:46:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-28 05:46:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:46:17,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:17,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 05:46:17,570 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-12-28 05:46:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965080526] [2021-12-28 05:46:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:17,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965080526] [2021-12-28 05:46:17,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965080526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272316305] [2021-12-28 05:46:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:17,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:17,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:17,684 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) [2021-12-28 05:46:17,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:46:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 05:46:17,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:18,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:18,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272316305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:18,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:18,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2021-12-28 05:46:18,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865557592] [2021-12-28 05:46:18,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:18,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-28 05:46:18,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-28 05:46:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:46:18,085 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:18,371 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-28 05:46:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:46:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-28 05:46:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:18,372 INFO L225 Difference]: With dead ends: 49 [2021-12-28 05:46:18,372 INFO L226 Difference]: Without dead ends: 49 [2021-12-28 05:46:18,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:46:18,372 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:18,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 212 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:46:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-28 05:46:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-12-28 05:46:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 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) [2021-12-28 05:46:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-28 05:46:18,374 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-12-28 05:46:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:18,374 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-28 05:46:18,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-28 05:46:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:46:18,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:18,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:18,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:18,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:18,575 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-12-28 05:46:18,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:18,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230270350] [2021-12-28 05:46:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:18,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:18,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230270350] [2021-12-28 05:46:18,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230270350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990374896] [2021-12-28 05:46:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:18,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:18,904 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) [2021-12-28 05:46:18,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:46:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-28 05:46:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:19,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:46:19,073 INFO L353 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-12-28 05:46:19,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-28 05:46:19,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:46:19,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:19,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-28 05:46:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:19,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:46:19,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990374896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:19,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:46:19,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2021-12-28 05:46:19,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953110527] [2021-12-28 05:46:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:19,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:46:19,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:46:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:46:19,259 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:19,288 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-28 05:46:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:46:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-28 05:46:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:19,289 INFO L225 Difference]: With dead ends: 65 [2021-12-28 05:46:19,289 INFO L226 Difference]: Without dead ends: 65 [2021-12-28 05:46:19,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-28 05:46:19,290 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:19,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 166 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2021-12-28 05:46:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-28 05:46:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-28 05:46:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 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) [2021-12-28 05:46:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-12-28 05:46:19,292 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-12-28 05:46:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:19,292 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-12-28 05:46:19,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-12-28 05:46:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:46:19,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:19,293 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:19,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 05:46:19,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:19,506 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-12-28 05:46:19,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:19,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991866096] [2021-12-28 05:46:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:19,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:19,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:19,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991866096] [2021-12-28 05:46:19,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991866096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:46:19,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:46:19,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 05:46:19,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518733514] [2021-12-28 05:46:19,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:46:19,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 05:46:19,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 05:46:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:46:19,625 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:19,738 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-28 05:46:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:46:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-28 05:46:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:19,739 INFO L225 Difference]: With dead ends: 93 [2021-12-28 05:46:19,739 INFO L226 Difference]: Without dead ends: 93 [2021-12-28 05:46:19,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:46:19,739 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:19,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:46:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-28 05:46:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-12-28 05:46:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 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) [2021-12-28 05:46:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-28 05:46:19,741 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-12-28 05:46:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:19,741 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-28 05:46:19,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-28 05:46:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:46:19,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:19,742 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 05:46:19,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 05:46:19,742 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:19,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-12-28 05:46:19,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309349049] [2021-12-28 05:46:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:19,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309349049] [2021-12-28 05:46:19,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309349049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516713131] [2021-12-28 05:46:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:19,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:19,849 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) [2021-12-28 05:46:19,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:46:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 05:46:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:20,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:20,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:20,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516713131] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:20,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:20,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-28 05:46:20,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564107855] [2021-12-28 05:46:20,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:20,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 05:46:20,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 05:46:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-28 05:46:20,241 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 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) [2021-12-28 05:46:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:20,458 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-28 05:46:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:46:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-28 05:46:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:20,459 INFO L225 Difference]: With dead ends: 86 [2021-12-28 05:46:20,459 INFO L226 Difference]: Without dead ends: 86 [2021-12-28 05:46:20,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:46:20,460 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 192 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:20,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 281 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:46:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-28 05:46:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-28 05:46:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 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) [2021-12-28 05:46:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-12-28 05:46:20,461 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-12-28 05:46:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:20,461 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-12-28 05:46:20,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 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) [2021-12-28 05:46:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-12-28 05:46:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:46:20,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:20,462 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:20,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:20,662 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,SelfDestructingSolverStorable21 [2021-12-28 05:46:20,662 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:20,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-12-28 05:46:20,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:20,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856139158] [2021-12-28 05:46:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:20,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:20,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856139158] [2021-12-28 05:46:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856139158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33859263] [2021-12-28 05:46:20,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:46:20,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:20,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:20,813 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) [2021-12-28 05:46:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:46:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:46:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-28 05:46:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:20,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:46:21,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:21,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-28 05:46:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:21,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:21,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:46:21,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:21,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-28 05:46:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:21,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33859263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:21,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:21,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-12-28 05:46:21,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641955800] [2021-12-28 05:46:21,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:21,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-28 05:46:21,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:21,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-28 05:46:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 05:46:21,982 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-12-28 05:46:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:22,522 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-12-28 05:46:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:46:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-28 05:46:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:22,524 INFO L225 Difference]: With dead ends: 134 [2021-12-28 05:46:22,524 INFO L226 Difference]: Without dead ends: 115 [2021-12-28 05:46:22,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=2494, Unknown=0, NotChecked=0, Total=2756 [2021-12-28 05:46:22,525 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:22,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 373 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-28 05:46:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-28 05:46:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2021-12-28 05:46:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-12-28 05:46:22,528 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2021-12-28 05:46:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:22,528 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-12-28 05:46:22,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-12-28 05:46:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-12-28 05:46:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 05:46:22,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:22,528 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 05:46:22,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:22,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:22,745 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-12-28 05:46:22,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587549317] [2021-12-28 05:46:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:22,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:22,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587549317] [2021-12-28 05:46:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587549317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123887941] [2021-12-28 05:46:22,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:46:22,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:22,986 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) [2021-12-28 05:46:23,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:46:23,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:46:23,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-28 05:46:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:23,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:23,198 INFO L387 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 [2021-12-28 05:46:23,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:46:23,395 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-28 05:46:23,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-28 05:46:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:23,551 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_286 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-28 05:46:23,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:23,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:46:23,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:23,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:46:23,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:46:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:23,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123887941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:23,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:23,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 32 [2021-12-28 05:46:23,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130234015] [2021-12-28 05:46:23,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:23,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 05:46:23,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 05:46:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=826, Unknown=1, NotChecked=58, Total=992 [2021-12-28 05:46:23,708 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:24,247 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2021-12-28 05:46:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:46:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-28 05:46:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:24,252 INFO L225 Difference]: With dead ends: 178 [2021-12-28 05:46:24,252 INFO L226 Difference]: Without dead ends: 178 [2021-12-28 05:46:24,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=1653, Unknown=1, NotChecked=86, Total=2070 [2021-12-28 05:46:24,253 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 209 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:24,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 455 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 255 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2021-12-28 05:46:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-28 05:46:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2021-12-28 05:46:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.139240506329114) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2021-12-28 05:46:24,257 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 37 [2021-12-28 05:46:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:24,257 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2021-12-28 05:46:24,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2021-12-28 05:46:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 05:46:24,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:24,258 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:24,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:24,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:24,471 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2021-12-28 05:46:24,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:24,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108059530] [2021-12-28 05:46:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:24,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:24,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108059530] [2021-12-28 05:46:24,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108059530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:24,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395667771] [2021-12-28 05:46:24,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:46:24,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:24,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:24,656 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) [2021-12-28 05:46:24,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:46:24,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:46:24,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-28 05:46:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:24,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:24,961 INFO L387 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 11 treesize of output 7 [2021-12-28 05:46:24,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-28 05:46:25,457 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-28 05:46:25,458 INFO L387 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-12-28 05:46:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:25,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:25,914 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) 0)) is different from false [2021-12-28 05:46:25,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:25,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-28 05:46:25,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:25,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-12-28 05:46:25,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:25,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:25,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2021-12-28 05:46:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395667771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:26,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:26,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16] total 42 [2021-12-28 05:46:26,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703490038] [2021-12-28 05:46:26,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:26,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-28 05:46:26,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-28 05:46:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1507, Unknown=1, NotChecked=78, Total=1722 [2021-12-28 05:46:26,117 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-12-28 05:46:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:26,826 INFO L93 Difference]: Finished difference Result 325 states and 354 transitions. [2021-12-28 05:46:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-28 05:46:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-28 05:46:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:26,827 INFO L225 Difference]: With dead ends: 325 [2021-12-28 05:46:26,827 INFO L226 Difference]: Without dead ends: 279 [2021-12-28 05:46:26,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=346, Invalid=3439, Unknown=1, NotChecked=120, Total=3906 [2021-12-28 05:46:26,829 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:26,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 731 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 498 Invalid, 0 Unknown, 317 Unchecked, 0.2s Time] [2021-12-28 05:46:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-28 05:46:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 194. [2021-12-28 05:46:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 193 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 218 transitions. [2021-12-28 05:46:26,833 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 218 transitions. Word has length 39 [2021-12-28 05:46:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:26,833 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 218 transitions. [2021-12-28 05:46:26,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-12-28 05:46:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 218 transitions. [2021-12-28 05:46:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 05:46:26,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:26,834 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 05:46:26,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 05:46:27,051 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,SelfDestructingSolverStorable24 [2021-12-28 05:46:27,051 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2021-12-28 05:46:27,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:27,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35905164] [2021-12-28 05:46:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:27,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:27,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:27,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35905164] [2021-12-28 05:46:27,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35905164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:27,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959105003] [2021-12-28 05:46:27,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:46:27,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:27,165 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) [2021-12-28 05:46:27,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:46:27,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 05:46:27,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-28 05:46:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:27,275 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:46:27,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:46:27,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 05:46:28,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:46:28,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:28,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2021-12-28 05:46:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:28,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-12-28 05:46:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:29,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959105003] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:29,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:29,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 44 [2021-12-28 05:46:29,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234975515] [2021-12-28 05:46:29,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:29,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-28 05:46:29,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-28 05:46:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:46:29,500 INFO L87 Difference]: Start difference. First operand 194 states and 218 transitions. Second operand has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:31,274 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2021-12-28 05:46:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-28 05:46:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-28 05:46:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:31,282 INFO L225 Difference]: With dead ends: 252 [2021-12-28 05:46:31,282 INFO L226 Difference]: Without dead ends: 252 [2021-12-28 05:46:31,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=743, Invalid=5419, Unknown=0, NotChecked=0, Total=6162 [2021-12-28 05:46:31,283 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:31,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 871 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 835 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2021-12-28 05:46:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-28 05:46:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-12-28 05:46:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-12-28 05:46:31,286 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 41 [2021-12-28 05:46:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:31,286 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-12-28 05:46:31,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-12-28 05:46:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 05:46:31,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:31,287 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-12-28 05:46:31,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:31,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-28 05:46:31,487 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-12-28 05:46:31,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:31,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303266634] [2021-12-28 05:46:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:31,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:46:31,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303266634] [2021-12-28 05:46:31,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303266634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390516503] [2021-12-28 05:46:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:31,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:31,669 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) [2021-12-28 05:46:31,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:46:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:31,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-28 05:46:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:31,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:46:31,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:46:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:46:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:32,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:46:32,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:46:32,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390516503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:32,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:32,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2021-12-28 05:46:32,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093231550] [2021-12-28 05:46:32,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:32,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-28 05:46:32,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-28 05:46:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:46:32,140 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:32,405 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2021-12-28 05:46:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:46:32,405 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-28 05:46:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:32,406 INFO L225 Difference]: With dead ends: 258 [2021-12-28 05:46:32,406 INFO L226 Difference]: Without dead ends: 227 [2021-12-28 05:46:32,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2021-12-28 05:46:32,407 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:32,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 299 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-12-28 05:46:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-28 05:46:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2021-12-28 05:46:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 225 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) [2021-12-28 05:46:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 253 transitions. [2021-12-28 05:46:32,428 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 253 transitions. Word has length 42 [2021-12-28 05:46:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:32,429 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 253 transitions. [2021-12-28 05:46:32,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 253 transitions. [2021-12-28 05:46:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 05:46:32,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:32,430 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:32,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:32,645 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,SelfDestructingSolverStorable26 [2021-12-28 05:46:32,646 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2021-12-28 05:46:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:32,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850017129] [2021-12-28 05:46:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:32,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:32,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850017129] [2021-12-28 05:46:32,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850017129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834087744] [2021-12-28 05:46:32,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:46:32,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:32,829 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) [2021-12-28 05:46:32,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:46:32,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:46:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-28 05:46:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:32,905 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:46:32,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:46:33,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:46:33,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:33,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:46:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:33,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:33,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:46:33,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834087744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:34,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:34,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2021-12-28 05:46:34,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256534592] [2021-12-28 05:46:34,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:34,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-28 05:46:34,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-28 05:46:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-12-28 05:46:34,372 INFO L87 Difference]: Start difference. First operand 226 states and 253 transitions. Second operand has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 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) [2021-12-28 05:46:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:35,910 INFO L93 Difference]: Finished difference Result 471 states and 519 transitions. [2021-12-28 05:46:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-28 05:46:35,911 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 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) Word has length 43 [2021-12-28 05:46:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:35,916 INFO L225 Difference]: With dead ends: 471 [2021-12-28 05:46:35,917 INFO L226 Difference]: Without dead ends: 471 [2021-12-28 05:46:35,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1301, Invalid=5341, Unknown=0, NotChecked=0, Total=6642 [2021-12-28 05:46:35,919 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 842 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:35,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 611 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 834 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2021-12-28 05:46:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-28 05:46:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 283. [2021-12-28 05:46:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 1.1387900355871887) internal successors, (320), 282 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 320 transitions. [2021-12-28 05:46:35,939 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 320 transitions. Word has length 43 [2021-12-28 05:46:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:35,940 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 320 transitions. [2021-12-28 05:46:35,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 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) [2021-12-28 05:46:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 320 transitions. [2021-12-28 05:46:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 05:46:35,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:35,950 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:35,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:36,165 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,SelfDestructingSolverStorable27 [2021-12-28 05:46:36,166 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:36,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2021-12-28 05:46:36,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:36,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38251590] [2021-12-28 05:46:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:36,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:36,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:36,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38251590] [2021-12-28 05:46:36,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38251590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:36,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495446103] [2021-12-28 05:46:36,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:46:36,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:36,764 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) [2021-12-28 05:46:36,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:46:36,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:46:36,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-28 05:46:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:36,859 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:46:36,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:46:36,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:37,103 INFO L387 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 [2021-12-28 05:46:37,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:37,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:46:37,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-28 05:46:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:38,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:38,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-28 05:46:38,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:38,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-28 05:46:38,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-28 05:46:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:38,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495446103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:38,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:38,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2021-12-28 05:46:38,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323317211] [2021-12-28 05:46:38,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:38,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-28 05:46:38,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-28 05:46:38,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2564, Unknown=28, NotChecked=0, Total=2756 [2021-12-28 05:46:38,503 INFO L87 Difference]: Start difference. First operand 283 states and 320 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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) [2021-12-28 05:46:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:39,939 INFO L93 Difference]: Finished difference Result 472 states and 532 transitions. [2021-12-28 05:46:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-28 05:46:39,939 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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 49 [2021-12-28 05:46:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:39,940 INFO L225 Difference]: With dead ends: 472 [2021-12-28 05:46:39,941 INFO L226 Difference]: Without dead ends: 445 [2021-12-28 05:46:39,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=621, Invalid=7361, Unknown=28, NotChecked=0, Total=8010 [2021-12-28 05:46:39,948 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:39,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 956 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 661 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2021-12-28 05:46:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-28 05:46:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 412. [2021-12-28 05:46:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 410 states have (on average 1.148780487804878) internal successors, (471), 411 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 471 transitions. [2021-12-28 05:46:39,956 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 471 transitions. Word has length 49 [2021-12-28 05:46:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:39,956 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 471 transitions. [2021-12-28 05:46:39,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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) [2021-12-28 05:46:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 471 transitions. [2021-12-28 05:46:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 05:46:39,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:39,959 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:39,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:40,175 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,SelfDestructingSolverStorable28 [2021-12-28 05:46:40,175 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1185464536, now seen corresponding path program 5 times [2021-12-28 05:46:40,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288639977] [2021-12-28 05:46:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:40,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288639977] [2021-12-28 05:46:40,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288639977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346060633] [2021-12-28 05:46:40,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:46:40,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:40,346 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) [2021-12-28 05:46:40,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 05:46:40,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-28 05:46:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:40,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-28 05:46:40,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:40,434 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:46:40,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:46:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:40,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:41,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346060633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:41,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:41,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2021-12-28 05:46:41,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064781693] [2021-12-28 05:46:41,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:41,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-28 05:46:41,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-28 05:46:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-12-28 05:46:41,040 INFO L87 Difference]: Start difference. First operand 412 states and 471 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) [2021-12-28 05:46:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:41,784 INFO L93 Difference]: Finished difference Result 889 states and 986 transitions. [2021-12-28 05:46:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 05:46:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) Word has length 53 [2021-12-28 05:46:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:41,786 INFO L225 Difference]: With dead ends: 889 [2021-12-28 05:46:41,786 INFO L226 Difference]: Without dead ends: 757 [2021-12-28 05:46:41,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=936, Invalid=3096, Unknown=0, NotChecked=0, Total=4032 [2021-12-28 05:46:41,787 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 261 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:41,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 562 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:46:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-12-28 05:46:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 540. [2021-12-28 05:46:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.1449814126394051) internal successors, (616), 539 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 616 transitions. [2021-12-28 05:46:41,795 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 616 transitions. Word has length 53 [2021-12-28 05:46:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:41,795 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 616 transitions. [2021-12-28 05:46:41,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 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) [2021-12-28 05:46:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 616 transitions. [2021-12-28 05:46:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 05:46:41,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:41,796 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:41,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:42,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:42,013 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2021-12-28 05:46:42,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:42,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074951628] [2021-12-28 05:46:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:42,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:42,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074951628] [2021-12-28 05:46:42,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074951628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:42,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743852000] [2021-12-28 05:46:42,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:46:42,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:42,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:42,165 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) [2021-12-28 05:46:42,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 05:46:42,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-28 05:46:42,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-28 05:46:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:46:42,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:46:42,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:42,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:42,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743852000] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:42,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:42,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2021-12-28 05:46:42,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915961493] [2021-12-28 05:46:42,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:42,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-28 05:46:42,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-28 05:46:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-12-28 05:46:42,823 INFO L87 Difference]: Start difference. First operand 540 states and 616 transitions. Second operand has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 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) [2021-12-28 05:46:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:43,454 INFO L93 Difference]: Finished difference Result 641 states and 720 transitions. [2021-12-28 05:46:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 05:46:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 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) Word has length 53 [2021-12-28 05:46:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:43,456 INFO L225 Difference]: With dead ends: 641 [2021-12-28 05:46:43,456 INFO L226 Difference]: Without dead ends: 641 [2021-12-28 05:46:43,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:46:43,457 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 348 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:43,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 843 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:46:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-28 05:46:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 601. [2021-12-28 05:46:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 599 states have (on average 1.1452420701168615) internal successors, (686), 600 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 686 transitions. [2021-12-28 05:46:43,464 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 686 transitions. Word has length 53 [2021-12-28 05:46:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:43,465 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 686 transitions. [2021-12-28 05:46:43,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 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) [2021-12-28 05:46:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 686 transitions. [2021-12-28 05:46:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:46:43,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:43,466 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:43,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:43,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:43,682 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2021-12-28 05:46:43,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:43,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467292864] [2021-12-28 05:46:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:43,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:43,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467292864] [2021-12-28 05:46:43,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467292864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018175383] [2021-12-28 05:46:43,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:46:43,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:43,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:43,892 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) [2021-12-28 05:46:43,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 05:46:43,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-28 05:46:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-28 05:46:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:44,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:46:44,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:46:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:44,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:44,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:46:44,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:44,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018175383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:44,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:44,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2021-12-28 05:46:44,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839901964] [2021-12-28 05:46:44,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:44,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-28 05:46:44,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-28 05:46:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:46:44,531 INFO L87 Difference]: Start difference. First operand 601 states and 686 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:45,122 INFO L93 Difference]: Finished difference Result 1102 states and 1231 transitions. [2021-12-28 05:46:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 05:46:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-28 05:46:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:45,124 INFO L225 Difference]: With dead ends: 1102 [2021-12-28 05:46:45,125 INFO L226 Difference]: Without dead ends: 1001 [2021-12-28 05:46:45,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2021-12-28 05:46:45,125 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 371 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:45,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1190 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 967 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-12-28 05:46:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-12-28 05:46:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 617. [2021-12-28 05:46:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 615 states have (on average 1.1447154471544716) internal successors, (704), 616 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 704 transitions. [2021-12-28 05:46:45,134 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 704 transitions. Word has length 57 [2021-12-28 05:46:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:45,134 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 704 transitions. [2021-12-28 05:46:45,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 704 transitions. [2021-12-28 05:46:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 05:46:45,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:45,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:45,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:45,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:45,352 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1017817884, now seen corresponding path program 1 times [2021-12-28 05:46:45,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:45,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772928554] [2021-12-28 05:46:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:45,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:46:45,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772928554] [2021-12-28 05:46:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772928554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748654965] [2021-12-28 05:46:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:45,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:45,529 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) [2021-12-28 05:46:45,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 05:46:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-28 05:46:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:45,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:45,778 INFO L387 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 [2021-12-28 05:46:45,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:46:45,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:46:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:46:45,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:45,968 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_595 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_595) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2021-12-28 05:46:45,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:45,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:46:45,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:45,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:46:45,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:46:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:46:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748654965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:46,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:46,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-28 05:46:46,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243089008] [2021-12-28 05:46:46,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:46,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 05:46:46,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 05:46:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2021-12-28 05:46:46,105 INFO L87 Difference]: Start difference. First operand 617 states and 704 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:46,378 INFO L93 Difference]: Finished difference Result 625 states and 700 transitions. [2021-12-28 05:46:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 05:46:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-28 05:46:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:46,380 INFO L225 Difference]: With dead ends: 625 [2021-12-28 05:46:46,380 INFO L226 Difference]: Without dead ends: 544 [2021-12-28 05:46:46,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=1258, Unknown=1, NotChecked=72, Total=1482 [2021-12-28 05:46:46,381 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:46,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 801 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2021-12-28 05:46:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-28 05:46:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 475. [2021-12-28 05:46:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.1374207188160677) internal successors, (538), 474 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 538 transitions. [2021-12-28 05:46:46,386 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 538 transitions. Word has length 58 [2021-12-28 05:46:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:46,386 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 538 transitions. [2021-12-28 05:46:46,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 538 transitions. [2021-12-28 05:46:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-28 05:46:46,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:46,388 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:46,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:46,597 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,SelfDestructingSolverStorable32 [2021-12-28 05:46:46,597 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2021-12-28 05:46:46,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:46,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984561222] [2021-12-28 05:46:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:46,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984561222] [2021-12-28 05:46:46,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984561222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741301192] [2021-12-28 05:46:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:46:46,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:46,836 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) [2021-12-28 05:46:46,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-28 05:46:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-28 05:46:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:47,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:47,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741301192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:47,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:47,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2021-12-28 05:46:47,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669817601] [2021-12-28 05:46:47,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:47,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-28 05:46:47,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-28 05:46:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-12-28 05:46:47,340 INFO L87 Difference]: Start difference. First operand 475 states and 538 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:47,919 INFO L93 Difference]: Finished difference Result 796 states and 885 transitions. [2021-12-28 05:46:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:46:47,920 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-12-28 05:46:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:47,921 INFO L225 Difference]: With dead ends: 796 [2021-12-28 05:46:47,921 INFO L226 Difference]: Without dead ends: 796 [2021-12-28 05:46:47,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2021-12-28 05:46:47,922 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 483 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:47,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 856 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:46:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-28 05:46:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 510. [2021-12-28 05:46:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.139763779527559) internal successors, (579), 509 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 579 transitions. [2021-12-28 05:46:47,930 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 579 transitions. Word has length 61 [2021-12-28 05:46:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 579 transitions. [2021-12-28 05:46:47,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 579 transitions. [2021-12-28 05:46:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-28 05:46:47,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:47,947 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:47,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:48,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:48,163 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2021-12-28 05:46:48,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740634820] [2021-12-28 05:46:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:48,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:48,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:48,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740634820] [2021-12-28 05:46:48,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740634820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:48,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567807199] [2021-12-28 05:46:48,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:46:48,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:48,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:48,496 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) [2021-12-28 05:46:48,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-28 05:46:48,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-28 05:46:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:48,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-28 05:46:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:48,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:48,845 INFO L387 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 [2021-12-28 05:46:48,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:46:49,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:46:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:49,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:49,223 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_672 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_672) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2021-12-28 05:46:49,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:49,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:46:49,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:49,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:46:49,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:46:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:49,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567807199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:49,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 44 [2021-12-28 05:46:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132970477] [2021-12-28 05:46:49,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-28 05:46:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-28 05:46:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2021-12-28 05:46:49,477 INFO L87 Difference]: Start difference. First operand 510 states and 579 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:50,654 INFO L93 Difference]: Finished difference Result 938 states and 1044 transitions. [2021-12-28 05:46:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-28 05:46:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-28 05:46:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:50,656 INFO L225 Difference]: With dead ends: 938 [2021-12-28 05:46:50,656 INFO L226 Difference]: Without dead ends: 798 [2021-12-28 05:46:50,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=4280, Unknown=1, NotChecked=132, Total=4692 [2021-12-28 05:46:50,657 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 193 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:50,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 2123 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1970 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2021-12-28 05:46:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-28 05:46:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 574. [2021-12-28 05:46:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.1398601398601398) internal successors, (652), 573 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 652 transitions. [2021-12-28 05:46:50,666 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 652 transitions. Word has length 61 [2021-12-28 05:46:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:50,666 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 652 transitions. [2021-12-28 05:46:50,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 652 transitions. [2021-12-28 05:46:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 05:46:50,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:50,667 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:50,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:50,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:50,884 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2021-12-28 05:46:50,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821820357] [2021-12-28 05:46:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:50,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:51,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821820357] [2021-12-28 05:46:51,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821820357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977185832] [2021-12-28 05:46:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:46:51,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:51,062 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) [2021-12-28 05:46:51,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-28 05:46:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-28 05:46:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:51,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:51,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977185832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:51,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:51,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-28 05:46:51,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503329320] [2021-12-28 05:46:51,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:51,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 05:46:51,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 05:46:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:46:51,749 INFO L87 Difference]: Start difference. First operand 574 states and 652 transitions. Second operand has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:52,315 INFO L93 Difference]: Finished difference Result 861 states and 965 transitions. [2021-12-28 05:46:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 05:46:52,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 65 [2021-12-28 05:46:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:52,317 INFO L225 Difference]: With dead ends: 861 [2021-12-28 05:46:52,317 INFO L226 Difference]: Without dead ends: 861 [2021-12-28 05:46:52,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-12-28 05:46:52,318 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 372 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:52,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 947 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:46:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-12-28 05:46:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 640. [2021-12-28 05:46:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.141065830721003) internal successors, (728), 639 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 728 transitions. [2021-12-28 05:46:52,325 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 728 transitions. Word has length 65 [2021-12-28 05:46:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:52,325 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 728 transitions. [2021-12-28 05:46:52,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 728 transitions. [2021-12-28 05:46:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 05:46:52,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:52,326 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:52,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:52,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:52,543 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2021-12-28 05:46:52,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:52,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846591465] [2021-12-28 05:46:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:52,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:52,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:52,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846591465] [2021-12-28 05:46:52,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846591465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:52,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290262969] [2021-12-28 05:46:52,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:46:52,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:52,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:52,804 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) [2021-12-28 05:46:52,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-28 05:46:52,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:46:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-28 05:46:52,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:53,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:46:53,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:53,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-28 05:46:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:54,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:54,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:46:54,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:46:54,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:54,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290262969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:54,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:54,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 57 [2021-12-28 05:46:54,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094318731] [2021-12-28 05:46:54,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:54,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-28 05:46:54,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:54,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-28 05:46:54,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2021-12-28 05:46:54,772 INFO L87 Difference]: Start difference. First operand 640 states and 728 transitions. Second operand has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 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) [2021-12-28 05:46:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:56,657 INFO L93 Difference]: Finished difference Result 1303 states and 1451 transitions. [2021-12-28 05:46:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-28 05:46:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 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) Word has length 66 [2021-12-28 05:46:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:56,661 INFO L225 Difference]: With dead ends: 1303 [2021-12-28 05:46:56,661 INFO L226 Difference]: Without dead ends: 1252 [2021-12-28 05:46:56,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=570, Invalid=7086, Unknown=0, NotChecked=0, Total=7656 [2021-12-28 05:46:56,665 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 439 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:56,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 2055 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1426 Invalid, 0 Unknown, 605 Unchecked, 0.5s Time] [2021-12-28 05:46:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-12-28 05:46:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 818. [2021-12-28 05:46:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 816 states have (on average 1.1397058823529411) internal successors, (930), 817 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 930 transitions. [2021-12-28 05:46:56,678 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 930 transitions. Word has length 66 [2021-12-28 05:46:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:56,678 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 930 transitions. [2021-12-28 05:46:56,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 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) [2021-12-28 05:46:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 930 transitions. [2021-12-28 05:46:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 05:46:56,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:56,680 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:56,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:56,896 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,SelfDestructingSolverStorable36 [2021-12-28 05:46:56,896 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:46:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2021-12-28 05:46:56,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:56,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222580597] [2021-12-28 05:46:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:56,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:57,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:57,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222580597] [2021-12-28 05:46:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222580597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:57,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483253887] [2021-12-28 05:46:57,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:46:57,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:57,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:57,261 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) [2021-12-28 05:46:57,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-28 05:46:57,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:46:57,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-28 05:46:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:57,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:46:57,677 INFO L387 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 [2021-12-28 05:46:57,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:46:59,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:46:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:46:59,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:46:59,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2021-12-28 05:46:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:46:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:00,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrspn_~p~0#1.offset_100| Int) (v_ArrVal_793 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_793) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_793 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (<= 1 |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|)) (not (= (select .cse0 (+ 3 |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|)) .cse1)) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1) |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|) (not (= .cse1 (select .cse0 (+ (- 1) |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|)))) (= .cse1 0)))) is different from false [2021-12-28 05:47:00,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:00,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-12-28 05:47:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:47:00,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:00,420 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 83 [2021-12-28 05:47:00,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:47:00,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:00,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2021-12-28 05:47:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:01,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483253887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:01,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:01,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 29] total 71 [2021-12-28 05:47:01,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079363039] [2021-12-28 05:47:01,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:01,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-28 05:47:01,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-28 05:47:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=4571, Unknown=1, NotChecked=136, Total=4970 [2021-12-28 05:47:01,423 INFO L87 Difference]: Start difference. First operand 818 states and 930 transitions. Second operand has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:03,030 INFO L93 Difference]: Finished difference Result 1560 states and 1762 transitions. [2021-12-28 05:47:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-28 05:47:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-28 05:47:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:03,034 INFO L225 Difference]: With dead ends: 1560 [2021-12-28 05:47:03,034 INFO L226 Difference]: Without dead ends: 1517 [2021-12-28 05:47:03,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=524, Invalid=9985, Unknown=1, NotChecked=202, Total=10712 [2021-12-28 05:47:03,043 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 310 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1613 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:03,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 3651 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1591 Invalid, 0 Unknown, 1613 Unchecked, 0.5s Time] [2021-12-28 05:47:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-12-28 05:47:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1282. [2021-12-28 05:47:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1280 states have (on average 1.1515625) internal successors, (1474), 1281 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1474 transitions. [2021-12-28 05:47:03,061 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1474 transitions. Word has length 73 [2021-12-28 05:47:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:03,061 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1474 transitions. [2021-12-28 05:47:03,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1474 transitions. [2021-12-28 05:47:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 05:47:03,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:03,064 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:03,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:03,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-28 05:47:03,277 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:47:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 9 times [2021-12-28 05:47:03,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969838651] [2021-12-28 05:47:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:03,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:03,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969838651] [2021-12-28 05:47:03,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969838651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566784823] [2021-12-28 05:47:03,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:47:03,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:03,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:03,558 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) [2021-12-28 05:47:03,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-28 05:47:03,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-28 05:47:03,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-28 05:47:03,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:03,740 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:47:03,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:47:03,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:47:04,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:04,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-28 05:47:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-28 05:47:04,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:05,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:47:05,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:47:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-28 05:47:05,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566784823] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:05,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:05,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10] total 43 [2021-12-28 05:47:05,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231741438] [2021-12-28 05:47:05,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:05,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-28 05:47:05,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-28 05:47:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 05:47:05,528 INFO L87 Difference]: Start difference. First operand 1282 states and 1474 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 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) [2021-12-28 05:47:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:07,284 INFO L93 Difference]: Finished difference Result 1693 states and 1921 transitions. [2021-12-28 05:47:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-28 05:47:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-28 05:47:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:07,287 INFO L225 Difference]: With dead ends: 1693 [2021-12-28 05:47:07,288 INFO L226 Difference]: Without dead ends: 1558 [2021-12-28 05:47:07,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=593, Invalid=7963, Unknown=0, NotChecked=0, Total=8556 [2021-12-28 05:47:07,288 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:07,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 940 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 992 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2021-12-28 05:47:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-12-28 05:47:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1253. [2021-12-28 05:47:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1251 states have (on average 1.149480415667466) internal successors, (1438), 1252 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1438 transitions. [2021-12-28 05:47:07,300 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1438 transitions. Word has length 75 [2021-12-28 05:47:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:07,300 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 1438 transitions. [2021-12-28 05:47:07,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 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) [2021-12-28 05:47:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1438 transitions. [2021-12-28 05:47:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 05:47:07,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:07,302 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:07,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-28 05:47:07,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-28 05:47:07,519 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:47:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2021-12-28 05:47:07,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:07,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417890815] [2021-12-28 05:47:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:07,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:07,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417890815] [2021-12-28 05:47:07,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417890815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957520514] [2021-12-28 05:47:07,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:47:07,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:07,709 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) [2021-12-28 05:47:07,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-28 05:47:07,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-28 05:47:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-28 05:47:07,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:07,855 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:47:07,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:47:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:08,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:08,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957520514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:08,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:08,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-28 05:47:08,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527886451] [2021-12-28 05:47:08,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:08,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-28 05:47:08,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-28 05:47:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-12-28 05:47:08,816 INFO L87 Difference]: Start difference. First operand 1253 states and 1438 transitions. Second operand has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:09,733 INFO L93 Difference]: Finished difference Result 1717 states and 1961 transitions. [2021-12-28 05:47:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-28 05:47:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-28 05:47:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:09,737 INFO L225 Difference]: With dead ends: 1717 [2021-12-28 05:47:09,737 INFO L226 Difference]: Without dead ends: 1717 [2021-12-28 05:47:09,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2021-12-28 05:47:09,738 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 413 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:09,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 831 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:47:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-12-28 05:47:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1349. [2021-12-28 05:47:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1347 states have (on average 1.1499628804751298) internal successors, (1549), 1348 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1549 transitions. [2021-12-28 05:47:09,758 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1549 transitions. Word has length 77 [2021-12-28 05:47:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:09,758 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 1549 transitions. [2021-12-28 05:47:09,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1549 transitions. [2021-12-28 05:47:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 05:47:09,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:09,760 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:09,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:09,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:09,975 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:47:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 791104003, now seen corresponding path program 2 times [2021-12-28 05:47:09,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353499649] [2021-12-28 05:47:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:09,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:10,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353499649] [2021-12-28 05:47:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353499649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460477630] [2021-12-28 05:47:10,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:10,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:10,355 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) [2021-12-28 05:47:10,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-28 05:47:10,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:47:10,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-28 05:47:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:10,506 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:47:10,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:47:10,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:47:12,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:12,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-28 05:47:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:12,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:13,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-28 05:47:13,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:47:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 119 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:13,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460477630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:13,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2021-12-28 05:47:13,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372300771] [2021-12-28 05:47:13,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-28 05:47:13,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-28 05:47:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3886, Unknown=0, NotChecked=0, Total=4160 [2021-12-28 05:47:13,625 INFO L87 Difference]: Start difference. First operand 1349 states and 1549 transitions. Second operand has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:15,973 INFO L93 Difference]: Finished difference Result 3068 states and 3505 transitions. [2021-12-28 05:47:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-28 05:47:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-28 05:47:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:15,978 INFO L225 Difference]: With dead ends: 3068 [2021-12-28 05:47:15,979 INFO L226 Difference]: Without dead ends: 2811 [2021-12-28 05:47:15,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1006, Invalid=12334, Unknown=0, NotChecked=0, Total=13340 [2021-12-28 05:47:15,980 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 618 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:15,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1804 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1304 Invalid, 0 Unknown, 400 Unchecked, 0.4s Time] [2021-12-28 05:47:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-12-28 05:47:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1757. [2021-12-28 05:47:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1755 states have (on average 1.1515669515669515) internal successors, (2021), 1756 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2021 transitions. [2021-12-28 05:47:16,001 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2021 transitions. Word has length 78 [2021-12-28 05:47:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:16,002 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 2021 transitions. [2021-12-28 05:47:16,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2021 transitions. [2021-12-28 05:47:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 05:47:16,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:16,004 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:16,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:16,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:16,221 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:47:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1322263080, now seen corresponding path program 2 times [2021-12-28 05:47:16,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933047520] [2021-12-28 05:47:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:16,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:47:16,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933047520] [2021-12-28 05:47:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933047520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224920422] [2021-12-28 05:47:16,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:16,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:16,765 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) [2021-12-28 05:47:16,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-28 05:47:16,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:47:16,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-28 05:47:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:16,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:47:17,206 INFO L387 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 [2021-12-28 05:47:17,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:47:18,377 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-28 05:47:18,378 INFO L387 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-12-28 05:47:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:47:18,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:18,812 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_975 (Array Int Int)) (|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (let ((.cse0 (select v_ArrVal_975 |ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_975) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse0 0)))) is different from false [2021-12-28 05:47:18,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:18,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-28 05:47:18,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:18,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-12-28 05:47:18,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:18,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-12-28 05:47:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 123 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 05:47:19,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224920422] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:19,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:19,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 70 [2021-12-28 05:47:19,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540445204] [2021-12-28 05:47:19,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:19,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-28 05:47:19,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-28 05:47:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4432, Unknown=1, NotChecked=134, Total=4830 [2021-12-28 05:47:19,044 INFO L87 Difference]: Start difference. First operand 1757 states and 2021 transitions. Second operand has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:19,923 INFO L93 Difference]: Finished difference Result 3098 states and 3570 transitions. [2021-12-28 05:47:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-28 05:47:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-28 05:47:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:19,931 INFO L225 Difference]: With dead ends: 3098 [2021-12-28 05:47:19,932 INFO L226 Difference]: Without dead ends: 3098 [2021-12-28 05:47:19,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=429, Invalid=7406, Unknown=1, NotChecked=174, Total=8010 [2021-12-28 05:47:19,933 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 189 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:19,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1585 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1440 Invalid, 0 Unknown, 335 Unchecked, 0.4s Time] [2021-12-28 05:47:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-12-28 05:47:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2667. [2021-12-28 05:47:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2665 states have (on average 1.1545966228893059) internal successors, (3077), 2666 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3077 transitions. [2021-12-28 05:47:20,014 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3077 transitions. Word has length 82 [2021-12-28 05:47:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:20,014 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3077 transitions. [2021-12-28 05:47:20,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3077 transitions. [2021-12-28 05:47:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 05:47:20,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:20,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:20,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-28 05:47:20,237 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,SelfDestructingSolverStorable41 [2021-12-28 05:47:20,237 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:47:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 3 times [2021-12-28 05:47:20,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:20,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590316625] [2021-12-28 05:47:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:20,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:47:20,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590316625] [2021-12-28 05:47:20,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590316625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113878577] [2021-12-28 05:47:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:47:20,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:20,492 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) [2021-12-28 05:47:20,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-28 05:47:20,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-28 05:47:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-28 05:47:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:20,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:47:20,890 INFO L387 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 [2021-12-28 05:47:20,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:47:21,360 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-28 05:47:21,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-28 05:47:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:47:21,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:21,460 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1022) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2021-12-28 05:47:21,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:21,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:47:21,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:47:21,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:47:21,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:47:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:47:21,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113878577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:21,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:21,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 40 [2021-12-28 05:47:21,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608553926] [2021-12-28 05:47:21,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:21,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-28 05:47:21,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-28 05:47:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1374, Unknown=1, NotChecked=74, Total=1560 [2021-12-28 05:47:21,624 INFO L87 Difference]: Start difference. First operand 2667 states and 3077 transitions. Second operand has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:22,001 INFO L93 Difference]: Finished difference Result 2524 states and 2863 transitions. [2021-12-28 05:47:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-28 05:47:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-28 05:47:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:22,005 INFO L225 Difference]: With dead ends: 2524 [2021-12-28 05:47:22,005 INFO L226 Difference]: Without dead ends: 1699 [2021-12-28 05:47:22,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=200, Invalid=2455, Unknown=1, NotChecked=100, Total=2756 [2021-12-28 05:47:22,006 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 92 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:22,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1460 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 712 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2021-12-28 05:47:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-12-28 05:47:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1150. [2021-12-28 05:47:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1148 states have (on average 1.1402439024390243) internal successors, (1309), 1149 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1309 transitions. [2021-12-28 05:47:22,016 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1309 transitions. Word has length 82 [2021-12-28 05:47:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:22,016 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1309 transitions. [2021-12-28 05:47:22,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:47:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1309 transitions. [2021-12-28 05:47:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-28 05:47:22,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:22,018 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:22,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-28 05:47:22,245 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,SelfDestructingSolverStorable42 [2021-12-28 05:47:22,246 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-28 05:47:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:22,247 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 10 times [2021-12-28 05:47:22,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:22,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412859611] [2021-12-28 05:47:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:22,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:22,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:22,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412859611] [2021-12-28 05:47:22,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412859611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:22,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771202999] [2021-12-28 05:47:22,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:47:22,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:22,579 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) [2021-12-28 05:47:22,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-28 05:47:22,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:47:22,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-28 05:47:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:22,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:47:22,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:47:23,164 INFO L387 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 [2021-12-28 05:47:23,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19