./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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/cstrlen-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 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:55:42,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:55:42,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:55:42,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:55:42,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:55:42,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:55:42,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:55:42,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:55:42,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:55:42,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:55:42,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:55:42,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:55:42,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:55:42,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:55:42,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:55:42,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:55:42,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:55:42,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:55:42,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:55:42,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:55:42,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:55:42,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:55:42,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:55:42,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:55:42,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:55:42,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:55:42,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:55:42,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:55:42,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:55:42,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:55:42,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:55:42,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:55:42,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:55:42,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:55:42,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:55:42,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:55:42,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:55:42,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:55:42,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:55:42,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:55:42,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:55:42,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:55:42,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:55:42,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:55:42,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:55:42,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:55:42,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:55:42,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:55:42,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:55:42,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:55:42,383 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:55:42,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:55:42,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:55:42,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:55:42,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:55:42,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:55:42,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:55:42,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:55:42,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:55:42,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:55:42,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:55:42,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:42,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:55:42,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:55:42,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:55:42,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:55:42,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:55:42,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2021-12-15 13:55:42,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:55:42,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:55:42,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:55:42,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:55:42,617 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:55:42,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-12-15 13:55:42,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe5dd9ea2/3d2b60d1bb514b81bf48899786b34b18/FLAGa9c9d8cb9 [2021-12-15 13:55:43,044 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:55:43,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-12-15 13:55:43,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe5dd9ea2/3d2b60d1bb514b81bf48899786b34b18/FLAGa9c9d8cb9 [2021-12-15 13:55:43,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe5dd9ea2/3d2b60d1bb514b81bf48899786b34b18 [2021-12-15 13:55:43,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:55:43,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:55:43,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:43,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:55:43,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:55:43,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3328134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43, skipping insertion in model container [2021-12-15 13:55:43,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:55:43,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:55:43,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:43,621 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:55:43,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:43,687 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:55:43,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43 WrapperNode [2021-12-15 13:55:43,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:43,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:43,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:55:43,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:55:43,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,720 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-12-15 13:55:43,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:43,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:55:43,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:55:43,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:55:43,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:55:43,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:55:43,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:55:43,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:55:43,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (1/1) ... [2021-12-15 13:55:43,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:43,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:43,779 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) [2021-12-15 13:55:43,782 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 [2021-12-15 13:55:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:55:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:55:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:55:43,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:55:43,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:55:43,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:55:43,892 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:55:43,893 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:55:44,048 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:55:44,066 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:55:44,066 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 13:55:44,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:44 BoogieIcfgContainer [2021-12-15 13:55:44,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:55:44,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:55:44,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:55:44,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:55:44,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:55:43" (1/3) ... [2021-12-15 13:55:44,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abb6d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:55:44, skipping insertion in model container [2021-12-15 13:55:44,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:43" (2/3) ... [2021-12-15 13:55:44,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abb6d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:55:44, skipping insertion in model container [2021-12-15 13:55:44,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:44" (3/3) ... [2021-12-15 13:55:44,077 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-12-15 13:55:44,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:55:44,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-12-15 13:55:44,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:55:44,126 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 [2021-12-15 13:55:44,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-15 13:55:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:44,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-15 13:55:44,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616137617] [2021-12-15 13:55:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616137617] [2021-12-15 13:55:44,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616137617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:44,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169510526] [2021-12-15 13:55:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:44,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:44,349 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,392 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-15 13:55:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,399 INFO L225 Difference]: With dead ends: 40 [2021-12-15 13:55:44,399 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 13:55:44,401 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 [2021-12-15 13:55:44,406 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 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 [2021-12-15 13:55:44,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 13:55:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-12-15 13:55:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-15 13:55:44,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 6 [2021-12-15 13:55:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,428 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-15 13:55:44,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-15 13:55:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:44,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:55:44,430 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-15 13:55:44,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038608941] [2021-12-15 13:55:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038608941] [2021-12-15 13:55:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038608941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:55:44,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267022145] [2021-12-15 13:55:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:44,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:44,459 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,473 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-15 13:55:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,474 INFO L225 Difference]: With dead ends: 22 [2021-12-15 13:55:44,474 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 13:55:44,475 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 [2021-12-15 13:55:44,476 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 13:55:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-15 13:55:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 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) [2021-12-15 13:55:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-15 13:55:44,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-12-15 13:55:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,482 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-15 13:55:44,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-15 13:55:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:44,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:55:44,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,485 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-15 13:55:44,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987459849] [2021-12-15 13:55:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987459849] [2021-12-15 13:55:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987459849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:44,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626642107] [2021-12-15 13:55:44,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:44,540 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,578 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-12-15 13:55:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,579 INFO L225 Difference]: With dead ends: 21 [2021-12-15 13:55:44,579 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 13:55:44,579 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 [2021-12-15 13:55:44,580 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 13:55:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 13:55:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-15 13:55:44,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-12-15 13:55:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-15 13:55:44,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-15 13:55:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:44,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:55:44,584 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-15 13:55:44,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443235100] [2021-12-15 13:55:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443235100] [2021-12-15 13:55:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443235100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:44,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018016367] [2021-12-15 13:55:44,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:44,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:44,643 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,680 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-15 13:55:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:44,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,681 INFO L225 Difference]: With dead ends: 35 [2021-12-15 13:55:44,681 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 13:55:44,682 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 [2021-12-15 13:55:44,682 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 13:55:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-12-15 13:55:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-15 13:55:44,686 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-12-15 13:55:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,686 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-15 13:55:44,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-15 13:55:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:55:44,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:55:44,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-12-15 13:55:44,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106393847] [2021-12-15 13:55:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106393847] [2021-12-15 13:55:44,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106393847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:44,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618463153] [2021-12-15 13:55:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:44,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:44,740 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,774 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-12-15 13:55:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:55:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,775 INFO L225 Difference]: With dead ends: 22 [2021-12-15 13:55:44,775 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 13:55:44,776 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 [2021-12-15 13:55:44,777 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 13:55:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-15 13:55:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 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) [2021-12-15 13:55:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-15 13:55:44,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2021-12-15 13:55:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,780 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-15 13:55:44,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-15 13:55:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:55:44,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 13:55:44,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-12-15 13:55:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742962848] [2021-12-15 13:55:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742962848] [2021-12-15 13:55:44,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742962848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:44,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121644999] [2021-12-15 13:55:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:44,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:44,864 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,914 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-12-15 13:55:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:55:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,915 INFO L225 Difference]: With dead ends: 28 [2021-12-15 13:55:44,915 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 13:55:44,915 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 [2021-12-15 13:55:44,916 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 13:55:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-15 13:55:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-15 13:55:44,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-12-15 13:55:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-15 13:55:44,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-15 13:55:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:44,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 13:55:44,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1139876333, now seen corresponding path program 1 times [2021-12-15 13:55:44,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154046365] [2021-12-15 13:55:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:45,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154046365] [2021-12-15 13:55:45,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154046365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:45,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:45,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 13:55:45,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302551477] [2021-12-15 13:55:45,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:45,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:55:45,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:55:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:55:45,019 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2021-12-15 13:55:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:45,088 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-15 13:55:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:55:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 [2021-12-15 13:55:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:45,089 INFO L225 Difference]: With dead ends: 31 [2021-12-15 13:55:45,090 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 13:55:45,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:55:45,091 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:45,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 13:55:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-15 13:55:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-15 13:55:45,096 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2021-12-15 13:55:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:45,097 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-15 13:55:45,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2021-12-15 13:55:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-15 13:55:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:45,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:45,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:45,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 13:55:45,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-15 13:55:45,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901513982] [2021-12-15 13:55:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901513982] [2021-12-15 13:55:45,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901513982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176321500] [2021-12-15 13:55:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:45,153 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) [2021-12-15 13:55:45,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 13:55:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:55:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:45,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176321500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:45,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:45,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 13:55:45,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887388672] [2021-12-15 13:55:45,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:45,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:55:45,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:55:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:55:45,469 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:45,560 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-15 13:55:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:55:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 13:55:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:45,561 INFO L225 Difference]: With dead ends: 49 [2021-12-15 13:55:45,562 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 13:55:45,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:55:45,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:45,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 13:55:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2021-12-15 13:55:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-15 13:55:45,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-12-15 13:55:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:45,566 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-15 13:55:45,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-15 13:55:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:45,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:45,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:45,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:45,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:45,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1949222959, now seen corresponding path program 1 times [2021-12-15 13:55:45,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:45,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748235564] [2021-12-15 13:55:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:45,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748235564] [2021-12-15 13:55:45,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748235564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:45,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:45,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 13:55:45,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276291990] [2021-12-15 13:55:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:45,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:55:45,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:55:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:45,910 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-12-15 13:55:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:45,967 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-12-15 13:55:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:55:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 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 [2021-12-15 13:55:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:45,968 INFO L225 Difference]: With dead ends: 36 [2021-12-15 13:55:45,968 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 13:55:45,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:55:45,969 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:45,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 53 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 13:55:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-12-15 13:55:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-15 13:55:45,972 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2021-12-15 13:55:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:45,972 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-15 13:55:45,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-12-15 13:55:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-15 13:55:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:55:45,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:45,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:45,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 13:55:45,973 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash -204544928, now seen corresponding path program 1 times [2021-12-15 13:55:45,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:45,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103001302] [2021-12-15 13:55:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:46,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:46,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103001302] [2021-12-15 13:55:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103001302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:46,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:46,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:46,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820955033] [2021-12-15 13:55:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:46,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:46,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:46,020 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:46,029 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-15 13:55:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 13:55:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:46,030 INFO L225 Difference]: With dead ends: 24 [2021-12-15 13:55:46,030 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 13:55:46,030 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 [2021-12-15 13:55:46,031 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:46,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 13:55:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-15 13:55:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2021-12-15 13:55:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-15 13:55:46,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-12-15 13:55:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:46,036 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-15 13:55:46,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-15 13:55:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 13:55:46,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:46,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:46,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 13:55:46,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1346179180, now seen corresponding path program 1 times [2021-12-15 13:55:46,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:46,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127744007] [2021-12-15 13:55:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:46,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127744007] [2021-12-15 13:55:46,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127744007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958777475] [2021-12-15 13:55:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:46,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:46,127 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) [2021-12-15 13:55:46,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 13:55:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 13:55:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:46,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:46,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 13:55:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:46,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958777475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:46,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:46,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-15 13:55:46,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830712130] [2021-12-15 13:55:46,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:46,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 13:55:46,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 13:55:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-15 13:55:46,338 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:46,433 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-12-15 13:55:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:55:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 13:55:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:46,434 INFO L225 Difference]: With dead ends: 21 [2021-12-15 13:55:46,434 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 13:55:46,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-12-15 13:55:46,434 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:46,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 26 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 13:55:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-12-15 13:55:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-15 13:55:46,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-12-15 13:55:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:46,438 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-15 13:55:46,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-15 13:55:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:55:46,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:46,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:46,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:46,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 13:55:46,640 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash -893036467, now seen corresponding path program 2 times [2021-12-15 13:55:46,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:46,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33130297] [2021-12-15 13:55:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:46,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:46,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33130297] [2021-12-15 13:55:46,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33130297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:46,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644920184] [2021-12-15 13:55:46,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:46,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:46,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:46,839 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) [2021-12-15 13:55:46,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 13:55:46,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:46,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 13:55:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:46,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:55:47,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:47,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:55:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:47,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:47,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-15 13:55:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644920184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:47,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:47,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2021-12-15 13:55:47,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86280925] [2021-12-15 13:55:47,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:47,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 13:55:47,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 13:55:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-12-15 13:55:47,403 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:47,666 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-12-15 13:55:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:55:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:55:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:47,667 INFO L225 Difference]: With dead ends: 33 [2021-12-15 13:55:47,667 INFO L226 Difference]: Without dead ends: 27 [2021-12-15 13:55:47,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 13:55:47,668 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:47,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-12-15 13:55:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-15 13:55:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-12-15 13:55:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2021-12-15 13:55:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-15 13:55:47,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2021-12-15 13:55:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-15 13:55:47,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-15 13:55:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 13:55:47,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:47,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:47,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:47,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:47,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1388594295, now seen corresponding path program 3 times [2021-12-15 13:55:47,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:47,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319990652] [2021-12-15 13:55:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:47,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319990652] [2021-12-15 13:55:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319990652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605391243] [2021-12-15 13:55:47,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:55:47,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:47,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:47,978 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) [2021-12-15 13:55:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 13:55:48,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:55:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 13:55:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:48,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:55:48,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:55:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:48,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:48,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605391243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:48,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:48,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-15 13:55:48,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082400682] [2021-12-15 13:55:48,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:48,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 13:55:48,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 13:55:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:55:48,395 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2021-12-15 13:55:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:48,567 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-15 13:55:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:55:48,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) Word has length 22 [2021-12-15 13:55:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:48,568 INFO L225 Difference]: With dead ends: 38 [2021-12-15 13:55:48,568 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 13:55:48,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:55:48,569 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:48,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 77 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 165 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-12-15 13:55:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 13:55:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-15 13:55:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-15 13:55:48,570 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2021-12-15 13:55:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:48,570 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-15 13:55:48,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2021-12-15 13:55:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-15 13:55:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 13:55:48,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:48,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:48,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:48,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:48,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash -954145076, now seen corresponding path program 4 times [2021-12-15 13:55:48,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:48,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573813007] [2021-12-15 13:55:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:48,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573813007] [2021-12-15 13:55:48,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573813007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107868720] [2021-12-15 13:55:48,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:55:48,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:48,886 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) [2021-12-15 13:55:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 13:55:48,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:55:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 13:55:48,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:48,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:49,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 13:55:49,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:49,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:55:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:49,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:49,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:49,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:49,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107868720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:49,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:49,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2021-12-15 13:55:49,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815682176] [2021-12-15 13:55:49,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:55:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:55:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:55:49,798 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:50,254 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-12-15 13:55:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:55:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-15 13:55:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:50,255 INFO L225 Difference]: With dead ends: 32 [2021-12-15 13:55:50,255 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 13:55:50,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 13:55:50,265 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:50,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 70 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 237 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-12-15 13:55:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 13:55:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-12-15 13:55:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-12-15 13:55:50,267 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2021-12-15 13:55:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:50,267 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-12-15 13:55:50,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-12-15 13:55:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 13:55:50,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:50,268 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:50,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:50,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 13:55:50,471 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash -344976898, now seen corresponding path program 5 times [2021-12-15 13:55:50,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:50,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475232444] [2021-12-15 13:55:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:50,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:50,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475232444] [2021-12-15 13:55:50,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475232444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780603877] [2021-12-15 13:55:50,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:55:50,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:50,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:50,586 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) [2021-12-15 13:55:50,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 13:55:50,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 13:55:50,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:50,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 13:55:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:50,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:50,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:51,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780603877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:51,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:51,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2021-12-15 13:55:51,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470974282] [2021-12-15 13:55:51,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:51,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 13:55:51,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 13:55:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:55:51,123 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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) [2021-12-15 13:55:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:51,263 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-12-15 13:55:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 13:55:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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 [2021-12-15 13:55:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:51,263 INFO L225 Difference]: With dead ends: 49 [2021-12-15 13:55:51,263 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 13:55:51,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:55:51,265 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:51,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 13:55:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-15 13:55:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-15 13:55:51,268 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-12-15 13:55:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-15 13:55:51,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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) [2021-12-15 13:55:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-15 13:55:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 13:55:51,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:51,269 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:51,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:51,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 13:55:51,471 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1662825919, now seen corresponding path program 6 times [2021-12-15 13:55:51,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354103044] [2021-12-15 13:55:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:51,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:51,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:51,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354103044] [2021-12-15 13:55:51,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354103044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:51,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082444566] [2021-12-15 13:55:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:55:51,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:51,680 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) [2021-12-15 13:55:51,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 13:55:51,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 13:55:51,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 13:55:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:51,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:55:52,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:55:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:52,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:52,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:52,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:52,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082444566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:52,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:52,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2021-12-15 13:55:52,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189312827] [2021-12-15 13:55:52,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:52,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:55:52,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:55:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:55:52,590 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 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) [2021-12-15 13:55:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:52,991 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-12-15 13:55:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:55:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 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 34 [2021-12-15 13:55:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:52,992 INFO L225 Difference]: With dead ends: 54 [2021-12-15 13:55:52,992 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 13:55:52,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:55:52,993 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:52,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 504 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-12-15 13:55:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 13:55:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-12-15 13:55:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-15 13:55:52,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-12-15 13:55:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:52,995 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-15 13:55:52,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 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) [2021-12-15 13:55:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-15 13:55:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 13:55:52,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:52,996 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:53,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:53,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:53,199 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:53,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1974118660, now seen corresponding path program 7 times [2021-12-15 13:55:53,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:53,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945504292] [2021-12-15 13:55:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:53,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:53,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945504292] [2021-12-15 13:55:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945504292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326219461] [2021-12-15 13:55:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:55:53,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:53,341 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) [2021-12-15 13:55:53,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 13:55:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 13:55:53,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:53,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 13:55:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326219461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:53,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:53,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 30 [2021-12-15 13:55:53,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392026032] [2021-12-15 13:55:53,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:53,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:55:53,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:55:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:55:53,823 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:54,201 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-15 13:55:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:55:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 13:55:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:54,202 INFO L225 Difference]: With dead ends: 42 [2021-12-15 13:55:54,202 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 13:55:54,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 13:55:54,211 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:54,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 142 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:55:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 13:55:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-15 13:55:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-15 13:55:54,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-12-15 13:55:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:54,213 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-15 13:55:54,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-15 13:55:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 13:55:54,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:54,214 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:54,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:54,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 13:55:54,423 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1247513155, now seen corresponding path program 8 times [2021-12-15 13:55:54,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:54,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347780140] [2021-12-15 13:55:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:54,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:54,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:54,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347780140] [2021-12-15 13:55:54,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347780140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:54,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148568996] [2021-12-15 13:55:54,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:54,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:54,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:54,617 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) [2021-12-15 13:55:54,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 13:55:54,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:54,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:54,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-15 13:55:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:54,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:55:55,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:55,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:55:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:55,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:55,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 13:55:55,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:55,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148568996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:55,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:55,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2021-12-15 13:55:55,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739036060] [2021-12-15 13:55:55,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:55,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 13:55:55,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 13:55:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 13:55:55,810 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:56,514 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-12-15 13:55:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 13:55:56,514 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 13:55:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:56,515 INFO L225 Difference]: With dead ends: 65 [2021-12-15 13:55:56,515 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 13:55:56,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 13:55:56,516 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:56,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 185 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 477 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2021-12-15 13:55:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 13:55:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-12-15 13:55:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2021-12-15 13:55:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-15 13:55:56,518 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2021-12-15 13:55:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:56,518 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-15 13:55:56,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-15 13:55:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 13:55:56,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:56,519 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:56,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:56,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 13:55:56,732 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash 285729785, now seen corresponding path program 9 times [2021-12-15 13:55:56,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:56,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321282016] [2021-12-15 13:55:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:56,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:56,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:56,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321282016] [2021-12-15 13:55:56,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321282016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:56,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147758881] [2021-12-15 13:55:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:55:56,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:56,978 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) [2021-12-15 13:55:56,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 13:55:57,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-15 13:55:57,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:57,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 13:55:57,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:55:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:55:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:57,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:57,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:57,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147758881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:57,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:57,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2021-12-15 13:55:57,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38948564] [2021-12-15 13:55:57,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:57,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 13:55:57,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 13:55:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:55:57,563 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 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) [2021-12-15 13:55:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:58,120 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-15 13:55:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 13:55:58,120 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 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 46 [2021-12-15 13:55:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:58,120 INFO L225 Difference]: With dead ends: 70 [2021-12-15 13:55:58,120 INFO L226 Difference]: Without dead ends: 54 [2021-12-15 13:55:58,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:55:58,121 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:58,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 232 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 761 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2021-12-15 13:55:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-15 13:55:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-12-15 13:55:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 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) [2021-12-15 13:55:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-15 13:55:58,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2021-12-15 13:55:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:58,128 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-15 13:55:58,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 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) [2021-12-15 13:55:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-15 13:55:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 13:55:58,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:58,129 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:58,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:58,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:58,342 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:55:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:58,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1048562116, now seen corresponding path program 10 times [2021-12-15 13:55:58,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:58,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297477892] [2021-12-15 13:55:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:58,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:58,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297477892] [2021-12-15 13:55:58,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297477892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099393557] [2021-12-15 13:55:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:55:58,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:58,562 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) [2021-12-15 13:55:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 13:55:58,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:55:58,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-15 13:55:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:58,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 13:55:59,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:55:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:59,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:59,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:00,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099393557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:00,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:00,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 50 [2021-12-15 13:56:00,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210976448] [2021-12-15 13:56:00,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:00,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 13:56:00,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 13:56:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:56:00,472 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:01,304 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-15 13:56:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 13:56:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 0 states have call successors, (0), 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 50 [2021-12-15 13:56:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:01,305 INFO L225 Difference]: With dead ends: 56 [2021-12-15 13:56:01,305 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 13:56:01,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=761, Invalid=3529, Unknown=0, NotChecked=0, Total=4290 [2021-12-15 13:56:01,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:01,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 167 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 697 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2021-12-15 13:56:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 13:56:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-15 13:56:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2021-12-15 13:56:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-15 13:56:01,316 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2021-12-15 13:56:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:01,316 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-15 13:56:01,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-15 13:56:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 13:56:01,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:01,320 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:01,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:01,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:01,524 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash -38131346, now seen corresponding path program 11 times [2021-12-15 13:56:01,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:01,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595073782] [2021-12-15 13:56:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:01,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:01,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595073782] [2021-12-15 13:56:01,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595073782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443390346] [2021-12-15 13:56:01,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:56:01,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:01,755 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) [2021-12-15 13:56:01,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 13:56:01,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-15 13:56:01,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-15 13:56:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:01,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 81 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:02,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 81 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443390346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:02,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:02,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2021-12-15 13:56:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079795745] [2021-12-15 13:56:02,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:02,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-15 13:56:02,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-15 13:56:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 13:56:02,742 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:03,039 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-12-15 13:56:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 13:56:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 13:56:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:03,040 INFO L225 Difference]: With dead ends: 81 [2021-12-15 13:56:03,040 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 13:56:03,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 13:56:03,041 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:03,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:56:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 13:56:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-12-15 13:56:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2021-12-15 13:56:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-12-15 13:56:03,042 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-12-15 13:56:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:03,042 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-12-15 13:56:03,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-12-15 13:56:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 13:56:03,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:03,043 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:03,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-15 13:56:03,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 13:56:03,243 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1873381553, now seen corresponding path program 12 times [2021-12-15 13:56:03,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35001750] [2021-12-15 13:56:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:03,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:03,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:03,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35001750] [2021-12-15 13:56:03,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35001750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:03,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506530764] [2021-12-15 13:56:03,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:56:03,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:03,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:03,576 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) [2021-12-15 13:56:03,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 13:56:03,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-15 13:56:03,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-15 13:56:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:03,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:56:04,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:04,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:04,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:04,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:04,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506530764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:04,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:04,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2021-12-15 13:56:04,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882856655] [2021-12-15 13:56:04,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:04,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 13:56:04,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 13:56:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 13:56:04,318 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:05,118 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-15 13:56:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-15 13:56:05,118 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-15 13:56:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:05,118 INFO L225 Difference]: With dead ends: 86 [2021-12-15 13:56:05,118 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:56:05,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2021-12-15 13:56:05,120 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:05,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 322 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1184 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2021-12-15 13:56:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:56:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-12-15 13:56:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 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) [2021-12-15 13:56:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-15 13:56:05,121 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2021-12-15 13:56:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:05,121 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-15 13:56:05,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-15 13:56:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 13:56:05,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:05,122 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:05,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-15 13:56:05,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 13:56:05,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1870557580, now seen corresponding path program 13 times [2021-12-15 13:56:05,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:05,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120352833] [2021-12-15 13:56:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:05,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:05,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120352833] [2021-12-15 13:56:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120352833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411730376] [2021-12-15 13:56:05,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:56:05,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:05,596 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) [2021-12-15 13:56:05,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 13:56:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 13:56:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:05,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 13:56:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411730376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:06,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:06,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 46 [2021-12-15 13:56:06,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515599255] [2021-12-15 13:56:06,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:06,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 13:56:06,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 13:56:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 13:56:06,424 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 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) [2021-12-15 13:56:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:07,186 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-12-15 13:56:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 13:56:07,187 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 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 62 [2021-12-15 13:56:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:07,187 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:56:07,187 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:56:07,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=818, Invalid=3604, Unknown=0, NotChecked=0, Total=4422 [2021-12-15 13:56:07,199 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:07,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 291 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:56:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:56:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-12-15 13:56:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-15 13:56:07,202 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-12-15 13:56:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:07,203 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-15 13:56:07,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 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) [2021-12-15 13:56:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-15 13:56:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 13:56:07,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:07,203 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:07,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:07,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:07,404 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1985462061, now seen corresponding path program 14 times [2021-12-15 13:56:07,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:07,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619440303] [2021-12-15 13:56:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:07,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:07,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619440303] [2021-12-15 13:56:07,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619440303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023787311] [2021-12-15 13:56:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:07,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:07,764 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) [2021-12-15 13:56:07,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 13:56:07,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:07,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-15 13:56:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:08,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-15 13:56:08,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:08,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:56:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:09,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 13:56:09,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:09,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023787311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:09,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:09,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 64 [2021-12-15 13:56:09,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523166808] [2021-12-15 13:56:09,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:09,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 13:56:09,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 13:56:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3727, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 13:56:09,806 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 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) [2021-12-15 13:56:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:10,780 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-12-15 13:56:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 13:56:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 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 64 [2021-12-15 13:56:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:10,781 INFO L225 Difference]: With dead ends: 97 [2021-12-15 13:56:10,781 INFO L226 Difference]: Without dead ends: 75 [2021-12-15 13:56:10,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=522, Invalid=5958, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 13:56:10,782 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:10,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 450 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1150 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2021-12-15 13:56:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-15 13:56:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-12-15 13:56:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-12-15 13:56:10,784 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 64 [2021-12-15 13:56:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-12-15 13:56:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 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) [2021-12-15 13:56:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-12-15 13:56:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 13:56:10,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:10,784 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:10,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:11,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:11,000 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1317550185, now seen corresponding path program 15 times [2021-12-15 13:56:11,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:11,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746323588] [2021-12-15 13:56:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:11,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:11,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:11,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746323588] [2021-12-15 13:56:11,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746323588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:11,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743884820] [2021-12-15 13:56:11,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:11,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:11,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:11,422 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) [2021-12-15 13:56:11,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 13:56:11,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-15 13:56:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-15 13:56:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:11,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:56:12,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:12,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:12,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:12,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743884820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:12,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:12,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2021-12-15 13:56:12,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527765535] [2021-12-15 13:56:12,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:12,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 13:56:12,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 13:56:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 13:56:12,363 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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) [2021-12-15 13:56:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:13,438 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-15 13:56:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 13:56:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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 70 [2021-12-15 13:56:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:13,439 INFO L225 Difference]: With dead ends: 102 [2021-12-15 13:56:13,439 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 13:56:13,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=4597, Unknown=0, NotChecked=0, Total=4970 [2021-12-15 13:56:13,440 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:13,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 454 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1749 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2021-12-15 13:56:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 13:56:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-15 13:56:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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) [2021-12-15 13:56:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-15 13:56:13,442 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2021-12-15 13:56:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:13,442 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-15 13:56:13,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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) [2021-12-15 13:56:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-15 13:56:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 13:56:13,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:13,443 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:13,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-15 13:56:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-15 13:56:13,643 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 676245932, now seen corresponding path program 16 times [2021-12-15 13:56:13,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:13,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033382162] [2021-12-15 13:56:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:13,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:13,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:13,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033382162] [2021-12-15 13:56:13,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033382162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:13,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594974238] [2021-12-15 13:56:13,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:56:13,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:13,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:13,976 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) [2021-12-15 13:56:13,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 13:56:14,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:56:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-15 13:56:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:14,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:14,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 13:56:15,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:15,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:56:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 200 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:16,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 231 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:17,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594974238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:17,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:17,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 28] total 79 [2021-12-15 13:56:17,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782304924] [2021-12-15 13:56:17,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:17,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-15 13:56:17,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-15 13:56:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-12-15 13:56:17,456 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:18,993 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-15 13:56:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 13:56:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-15 13:56:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:18,994 INFO L225 Difference]: With dead ends: 80 [2021-12-15 13:56:18,994 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 13:56:18,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1583, Invalid=8317, Unknown=0, NotChecked=0, Total=9900 [2021-12-15 13:56:18,995 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 2005 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:18,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 493 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2005 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2021-12-15 13:56:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 13:56:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-15 13:56:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-15 13:56:18,998 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2021-12-15 13:56:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:18,998 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-15 13:56:18,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-15 13:56:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 13:56:18,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:18,999 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:19,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:19,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 13:56:19,204 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash 419261662, now seen corresponding path program 17 times [2021-12-15 13:56:19,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:19,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866866500] [2021-12-15 13:56:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:19,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 146 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:19,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866866500] [2021-12-15 13:56:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866866500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610301896] [2021-12-15 13:56:19,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:56:19,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:19,524 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) [2021-12-15 13:56:19,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 13:56:19,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-15 13:56:19,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-15 13:56:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610301896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:21,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2021-12-15 13:56:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605515903] [2021-12-15 13:56:21,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:21,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-15 13:56:21,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-15 13:56:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 13:56:21,175 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:21,949 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-12-15 13:56:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 13:56:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 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 [2021-12-15 13:56:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:21,950 INFO L225 Difference]: With dead ends: 113 [2021-12-15 13:56:21,950 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 13:56:21,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1615, Invalid=6941, Unknown=0, NotChecked=0, Total=8556 [2021-12-15 13:56:21,951 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:21,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 60 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:56:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 13:56:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-12-15 13:56:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-15 13:56:21,952 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2021-12-15 13:56:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:21,953 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-15 13:56:21,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-15 13:56:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 13:56:21,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:21,953 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:21,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:22,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 13:56:22,164 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash -215747807, now seen corresponding path program 18 times [2021-12-15 13:56:22,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:22,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733436308] [2021-12-15 13:56:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:22,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:22,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733436308] [2021-12-15 13:56:22,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733436308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557429349] [2021-12-15 13:56:22,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:56:22,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:22,645 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) [2021-12-15 13:56:22,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 13:56:22,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-15 13:56:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-15 13:56:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:56:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:23,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:23,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:23,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:23,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557429349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:23,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:23,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2021-12-15 13:56:23,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155611258] [2021-12-15 13:56:23,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:23,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 13:56:23,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 13:56:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 13:56:23,791 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 53 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 53 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:25,177 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-12-15 13:56:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-15 13:56:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 53 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 13:56:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:25,178 INFO L225 Difference]: With dead ends: 118 [2021-12-15 13:56:25,178 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 13:56:25,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=373, Invalid=6107, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 13:56:25,179 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:25,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 556 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2216 Invalid, 0 Unknown, 135 Unchecked, 0.6s Time] [2021-12-15 13:56:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 13:56:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-12-15 13:56:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-12-15 13:56:25,181 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2021-12-15 13:56:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:25,181 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-12-15 13:56:25,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 53 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-12-15 13:56:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-15 13:56:25,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:25,182 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:25,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:25,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:25,395 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1371037724, now seen corresponding path program 19 times [2021-12-15 13:56:25,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151306869] [2021-12-15 13:56:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:25,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:25,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:25,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151306869] [2021-12-15 13:56:25,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151306869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297073468] [2021-12-15 13:56:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:56:25,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:25,860 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) [2021-12-15 13:56:25,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 13:56:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-15 13:56:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:26,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:26,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 13:56:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:26,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297073468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:26,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:26,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2021-12-15 13:56:26,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319239664] [2021-12-15 13:56:26,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:26,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 13:56:26,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 13:56:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3538, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 13:56:26,995 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 64 states, 63 states have (on average 2.746031746031746) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:27,787 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-12-15 13:56:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 13:56:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.746031746031746) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-15 13:56:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:27,789 INFO L225 Difference]: With dead ends: 90 [2021-12-15 13:56:27,789 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 13:56:27,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2021-12-15 13:56:27,791 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 140 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:27,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 399 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 13:56:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 13:56:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-12-15 13:56:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-15 13:56:27,793 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-12-15 13:56:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:27,793 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-15 13:56:27,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.746031746031746) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-15 13:56:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 13:56:27,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:27,794 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:27,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:28,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 13:56:28,007 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash 987706525, now seen corresponding path program 20 times [2021-12-15 13:56:28,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:28,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367193450] [2021-12-15 13:56:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:28,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:28,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:28,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367193450] [2021-12-15 13:56:28,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367193450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:28,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267949238] [2021-12-15 13:56:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:28,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:28,534 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) [2021-12-15 13:56:28,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 13:56:28,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:28,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-15 13:56:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:56:30,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:56:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 276 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:30,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:31,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:31,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 13:56:31,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 276 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:31,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267949238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:31,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:31,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 84 [2021-12-15 13:56:31,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373699870] [2021-12-15 13:56:31,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:31,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-15 13:56:31,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-15 13:56:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=6477, Unknown=0, NotChecked=0, Total=6972 [2021-12-15 13:56:31,636 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:33,104 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2021-12-15 13:56:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-15 13:56:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-15 13:56:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:33,105 INFO L225 Difference]: With dead ends: 129 [2021-12-15 13:56:33,105 INFO L226 Difference]: Without dead ends: 99 [2021-12-15 13:56:33,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=810, Invalid=10110, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 13:56:33,106 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:33,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 666 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1771 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2021-12-15 13:56:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-15 13:56:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-12-15 13:56:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 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) [2021-12-15 13:56:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-12-15 13:56:33,108 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2021-12-15 13:56:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:33,108 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-12-15 13:56:33,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-12-15 13:56:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 13:56:33,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:33,109 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:33,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:33,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:33,327 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash -759383847, now seen corresponding path program 21 times [2021-12-15 13:56:33,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919257493] [2021-12-15 13:56:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:33,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:33,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919257493] [2021-12-15 13:56:33,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919257493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774778929] [2021-12-15 13:56:33,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:33,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:33,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:33,917 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) [2021-12-15 13:56:33,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 13:56:34,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-15 13:56:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:34,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-15 13:56:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:34,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:56:34,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:34,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:35,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774778929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:35,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:35,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2021-12-15 13:56:35,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848975593] [2021-12-15 13:56:35,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:35,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-15 13:56:35,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:35,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-15 13:56:35,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 13:56:35,202 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 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) [2021-12-15 13:56:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:36,995 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-12-15 13:56:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-15 13:56:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 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 94 [2021-12-15 13:56:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:36,996 INFO L225 Difference]: With dead ends: 134 [2021-12-15 13:56:36,996 INFO L226 Difference]: Without dead ends: 102 [2021-12-15 13:56:36,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=477, Invalid=7713, Unknown=0, NotChecked=0, Total=8190 [2021-12-15 13:56:36,996 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:36,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 769 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3041 Invalid, 0 Unknown, 115 Unchecked, 0.9s Time] [2021-12-15 13:56:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-15 13:56:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-12-15 13:56:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-12-15 13:56:36,998 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2021-12-15 13:56:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:36,998 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-12-15 13:56:36,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 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) [2021-12-15 13:56:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-12-15 13:56:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 13:56:36,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:36,999 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:37,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:37,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:37,219 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1483974372, now seen corresponding path program 22 times [2021-12-15 13:56:37,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:37,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965993494] [2021-12-15 13:56:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:37,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 325 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:37,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:37,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965993494] [2021-12-15 13:56:37,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965993494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229510910] [2021-12-15 13:56:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:56:37,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:37,724 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) [2021-12-15 13:56:37,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 13:56:37,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:56:37,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-15 13:56:37,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:37,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:38,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 13:56:39,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:56:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 392 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:39,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:40,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:40,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 435 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:42,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229510910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:42,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:42,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 103 [2021-12-15 13:56:42,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830944346] [2021-12-15 13:56:42,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:42,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-15 13:56:42,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-15 13:56:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=9623, Unknown=0, NotChecked=0, Total=10712 [2021-12-15 13:56:42,925 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 104 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:45,010 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-12-15 13:56:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-15 13:56:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 104 states have internal predecessors, (288), 0 states have call successors, (0), 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 98 [2021-12-15 13:56:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:45,011 INFO L225 Difference]: With dead ends: 104 [2021-12-15 13:56:45,011 INFO L226 Difference]: Without dead ends: 104 [2021-12-15 13:56:45,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2571, Invalid=13685, Unknown=0, NotChecked=0, Total=16256 [2021-12-15 13:56:45,012 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 263 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:45,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 502 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2327 Invalid, 0 Unknown, 19 Unchecked, 0.9s Time] [2021-12-15 13:56:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-15 13:56:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-15 13:56:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-12-15 13:56:45,014 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2021-12-15 13:56:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:45,014 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-12-15 13:56:45,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 104 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-12-15 13:56:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 13:56:45,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:45,015 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:45,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:45,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:45,221 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-15 13:56:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash -382084018, now seen corresponding path program 23 times [2021-12-15 13:56:45,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:45,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210818507] [2021-12-15 13:56:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:45,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 258 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:45,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:45,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210818507] [2021-12-15 13:56:45,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210818507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:45,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261298435] [2021-12-15 13:56:45,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:56:45,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:45,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:45,762 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) [2021-12-15 13:56:45,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 13:56:45,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-15 13:56:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-15 13:56:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:45,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 289 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:47,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 289 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:48,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261298435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:48,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:48,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 89 [2021-12-15 13:56:48,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629863246] [2021-12-15 13:56:48,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:48,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-15 13:56:48,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-15 13:56:48,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=6392, Unknown=0, NotChecked=0, Total=7832 [2021-12-15 13:56:48,248 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)