./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/vogal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/vogal-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:39:58,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:39:58,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:39:58,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:39:58,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:39:58,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:39:58,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:39:58,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:39:58,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:39:58,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:39:58,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:39:58,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:39:58,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:39:58,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:39:58,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:39:58,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:39:58,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:39:58,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:39:58,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:39:58,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:39:58,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:39:58,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:39:58,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:39:58,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:39:58,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:39:58,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:39:58,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:39:58,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:39:58,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:39:58,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:39:58,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:39:58,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:39:58,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:39:58,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:39:58,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:39:58,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:39:58,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:39:58,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:39:58,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:39:58,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:39:58,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:39:58,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:39:58,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:39:58,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:39:58,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:39:58,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:39:58,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:39:58,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:39:58,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:39:58,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:39:58,610 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:39:58,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:39:58,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:39:58,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:39:58,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:39:58,613 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:39:58,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:39:58,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:39:58,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:39:58,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:39:58,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:39:58,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:39:58,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:39:58,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:39:58,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:39:58,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:39:58,614 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:39:58,615 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:39:58,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:39:58,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:39:58,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 [2021-12-17 09:39:58,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:39:58,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:39:58,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:39:58,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:39:58,836 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:39:58,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-2.i [2021-12-17 09:39:58,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59a4a65f/de1a138067284e879a033146fa6e9616/FLAG2a094ae52 [2021-12-17 09:39:59,289 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:39:59,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i [2021-12-17 09:39:59,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59a4a65f/de1a138067284e879a033146fa6e9616/FLAG2a094ae52 [2021-12-17 09:39:59,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59a4a65f/de1a138067284e879a033146fa6e9616 [2021-12-17 09:39:59,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:39:59,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:39:59,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:39:59,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:39:59,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:39:59,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e54f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59, skipping insertion in model container [2021-12-17 09:39:59,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:39:59,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:39:59,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i[808,821] [2021-12-17 09:39:59,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:39:59,527 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:39:59,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i[808,821] [2021-12-17 09:39:59,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:39:59,558 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:39:59,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59 WrapperNode [2021-12-17 09:39:59,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:39:59,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:39:59,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:39:59,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:39:59,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,599 INFO L137 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2021-12-17 09:39:59,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:39:59,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:39:59,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:39:59,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:39:59,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:39:59,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:39:59,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:39:59,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:39:59,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (1/1) ... [2021-12-17 09:39:59,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:39:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:39:59,683 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) [2021-12-17 09:39:59,685 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 [2021-12-17 09:39:59,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:39:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:39:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 09:39:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 09:39:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:39:59,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:39:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 09:39:59,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 09:39:59,768 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:39:59,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:39:59,962 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:39:59,966 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:39:59,967 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-17 09:39:59,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:39:59 BoogieIcfgContainer [2021-12-17 09:39:59,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:39:59,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:39:59,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:39:59,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:39:59,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:39:59" (1/3) ... [2021-12-17 09:39:59,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab53231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:39:59, skipping insertion in model container [2021-12-17 09:39:59,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:39:59" (2/3) ... [2021-12-17 09:39:59,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab53231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:39:59, skipping insertion in model container [2021-12-17 09:39:59,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:39:59" (3/3) ... [2021-12-17 09:39:59,975 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2021-12-17 09:39:59,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:39:59,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:40:00,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:40:00,013 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-17 09:40:00,014 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:40:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 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) [2021-12-17 09:40:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 09:40:00,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:00,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:00,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2021-12-17 09:40:00,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607405685] [2021-12-17 09:40:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:00,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:40:00,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607405685] [2021-12-17 09:40:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607405685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:40:00,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:40:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:40:00,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266772101] [2021-12-17 09:40:00,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:40:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:40:00,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:00,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:40:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:40:00,194 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-12-17 09:40:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:00,205 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2021-12-17 09:40:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:40:00,207 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2021-12-17 09:40:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:00,212 INFO L225 Difference]: With dead ends: 52 [2021-12-17 09:40:00,212 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 09:40:00,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:40:00,216 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:00,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:40:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 09:40:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 09:40:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-12-17 09:40:00,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2021-12-17 09:40:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:00,241 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-12-17 09:40:00,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-12-17 09:40:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-12-17 09:40:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 09:40:00,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:00,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:00,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:40:00,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:00,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2021-12-17 09:40:00,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:00,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587576561] [2021-12-17 09:40:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:00,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:40:00,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:00,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587576561] [2021-12-17 09:40:00,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587576561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:40:00,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:40:00,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:40:00,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012699920] [2021-12-17 09:40:00,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:40:00,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:40:00,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:00,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:40:00,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:40:00,340 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:00,385 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-12-17 09:40:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:40:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-17 09:40:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:00,387 INFO L225 Difference]: With dead ends: 62 [2021-12-17 09:40:00,388 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 09:40:00,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:40:00,389 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:00,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:40:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 09:40:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2021-12-17 09:40:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2021-12-17 09:40:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-12-17 09:40:00,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2021-12-17 09:40:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:00,395 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-12-17 09:40:00,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-12-17 09:40:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 09:40:00,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:00,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:00,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:40:00,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2021-12-17 09:40:00,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540569808] [2021-12-17 09:40:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:00,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:40:00,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540569808] [2021-12-17 09:40:00,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540569808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:00,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504850802] [2021-12-17 09:40:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:00,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:00,474 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) [2021-12-17 09:40:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:40:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 09:40:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:40:00,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 09:40:00,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504850802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:40:00,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 09:40:00,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-12-17 09:40:00,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316743049] [2021-12-17 09:40:00,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:40:00,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 09:40:00,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 09:40:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:40:00,669 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-12-17 09:40:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:00,704 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-17 09:40:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 09:40:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 09:40:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:00,705 INFO L225 Difference]: With dead ends: 51 [2021-12-17 09:40:00,705 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 09:40:00,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 09:40:00,706 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:00,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:40:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 09:40:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-12-17 09:40:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-12-17 09:40:00,711 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 16 [2021-12-17 09:40:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:00,711 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-12-17 09:40:00,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-12-17 09:40:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-12-17 09:40:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 09:40:00,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:00,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:00,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:00,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:00,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash -35626147, now seen corresponding path program 1 times [2021-12-17 09:40:00,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:00,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263892491] [2021-12-17 09:40:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:00,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:40:01,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:01,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263892491] [2021-12-17 09:40:01,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263892491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586853070] [2021-12-17 09:40:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:01,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:01,040 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) [2021-12-17 09:40:01,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:40:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:01,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 09:40:01,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:40:01,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 09:40:01,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586853070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:40:01,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 09:40:01,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-17 09:40:01,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478838760] [2021-12-17 09:40:01,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:40:01,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 09:40:01,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 09:40:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 09:40:01,166 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2021-12-17 09:40:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:01,193 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2021-12-17 09:40:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 09:40:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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 22 [2021-12-17 09:40:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:01,195 INFO L225 Difference]: With dead ends: 96 [2021-12-17 09:40:01,195 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 09:40:01,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 09:40:01,196 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:01,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:40:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 09:40:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-12-17 09:40:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2021-12-17 09:40:01,202 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 22 [2021-12-17 09:40:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:01,202 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2021-12-17 09:40:01,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2021-12-17 09:40:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2021-12-17 09:40:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 09:40:01,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:01,203 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:01,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:01,420 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,SelfDestructingSolverStorable3 [2021-12-17 09:40:01,421 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1865102999, now seen corresponding path program 1 times [2021-12-17 09:40:01,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:01,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271748452] [2021-12-17 09:40:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:01,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:40:01,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271748452] [2021-12-17 09:40:01,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271748452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558165812] [2021-12-17 09:40:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:01,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:01,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:01,524 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) [2021-12-17 09:40:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:40:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 09:40:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:01,703 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 [2021-12-17 09:40:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:40:01,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:01,831 INFO L354 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2021-12-17 09:40:01,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2021-12-17 09:40:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:40:01,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558165812] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:01,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 09:40:01,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-12-17 09:40:01,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995061869] [2021-12-17 09:40:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:40:01,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:40:01,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:40:01,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-17 09:40:01,854 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2021-12-17 09:40:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:01,951 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-12-17 09:40:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 09:40:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-17 09:40:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:01,955 INFO L225 Difference]: With dead ends: 60 [2021-12-17 09:40:01,955 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 09:40:01,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-17 09:40:01,958 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:01,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 130 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:40:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 09:40:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-17 09:40:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-12-17 09:40:01,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2021-12-17 09:40:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:01,968 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-12-17 09:40:01,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2021-12-17 09:40:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-12-17 09:40:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 09:40:01,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:01,969 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:01,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 09:40:02,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:02,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash 350629058, now seen corresponding path program 1 times [2021-12-17 09:40:02,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705753088] [2021-12-17 09:40:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:02,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 09:40:02,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705753088] [2021-12-17 09:40:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705753088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632175587] [2021-12-17 09:40:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:02,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:02,280 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) [2021-12-17 09:40:02,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:40:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 09:40:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:02,454 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 16 treesize of output 8 [2021-12-17 09:40:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:40:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:02,561 INFO L354 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2021-12-17 09:40:02,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2021-12-17 09:40:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:40:02,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632175587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:02,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:02,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2021-12-17 09:40:02,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983958209] [2021-12-17 09:40:02,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:02,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 09:40:02,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:02,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 09:40:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-17 09:40:02,596 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:02,805 INFO L93 Difference]: Finished difference Result 168 states and 224 transitions. [2021-12-17 09:40:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 09:40:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-17 09:40:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:02,807 INFO L225 Difference]: With dead ends: 168 [2021-12-17 09:40:02,807 INFO L226 Difference]: Without dead ends: 134 [2021-12-17 09:40:02,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-12-17 09:40:02,808 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 273 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:02,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 152 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:40:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-17 09:40:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 43. [2021-12-17 09:40:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-12-17 09:40:02,814 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 24 [2021-12-17 09:40:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:02,814 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-12-17 09:40:02,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-12-17 09:40:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 09:40:02,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:02,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:02,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:03,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1327832546, now seen corresponding path program 1 times [2021-12-17 09:40:03,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:03,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612214337] [2021-12-17 09:40:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:03,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 09:40:03,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:03,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612214337] [2021-12-17 09:40:03,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612214337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:03,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643124545] [2021-12-17 09:40:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:03,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:03,128 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) [2021-12-17 09:40:03,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 09:40:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 09:40:03,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:40:03,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 09:40:03,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643124545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:03,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:03,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2021-12-17 09:40:03,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544250357] [2021-12-17 09:40:03,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:03,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 09:40:03,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 09:40:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 09:40:03,330 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2021-12-17 09:40:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:03,643 INFO L93 Difference]: Finished difference Result 318 states and 471 transitions. [2021-12-17 09:40:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 09:40:03,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) Word has length 27 [2021-12-17 09:40:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:03,645 INFO L225 Difference]: With dead ends: 318 [2021-12-17 09:40:03,645 INFO L226 Difference]: Without dead ends: 282 [2021-12-17 09:40:03,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-12-17 09:40:03,646 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:03,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 159 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:40:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-17 09:40:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 73. [2021-12-17 09:40:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-12-17 09:40:03,654 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 27 [2021-12-17 09:40:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:03,654 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-12-17 09:40:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2021-12-17 09:40:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-12-17 09:40:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 09:40:03,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:03,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:03,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:03,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:03,874 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1303869421, now seen corresponding path program 2 times [2021-12-17 09:40:03,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704485468] [2021-12-17 09:40:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:03,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 09:40:03,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704485468] [2021-12-17 09:40:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704485468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808499236] [2021-12-17 09:40:03,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:40:03,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:03,951 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) [2021-12-17 09:40:03,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 09:40:04,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:40:04,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:40:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 09:40:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:04,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 09:40:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2021-12-17 09:40:04,073 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 12 treesize of output 11 [2021-12-17 09:40:04,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 09:40:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 09:40:04,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 09:40:04,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808499236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:04,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:04,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 23 [2021-12-17 09:40:04,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732551148] [2021-12-17 09:40:04,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:04,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 09:40:04,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 09:40:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-17 09:40:04,673 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:05,444 INFO L93 Difference]: Finished difference Result 544 states and 715 transitions. [2021-12-17 09:40:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 09:40:05,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-17 09:40:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:05,447 INFO L225 Difference]: With dead ends: 544 [2021-12-17 09:40:05,447 INFO L226 Difference]: Without dead ends: 480 [2021-12-17 09:40:05,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 09:40:05,449 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 611 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:05,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 624 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 09:40:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-17 09:40:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 162. [2021-12-17 09:40:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2981366459627328) internal successors, (209), 161 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 209 transitions. [2021-12-17 09:40:05,463 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 209 transitions. Word has length 38 [2021-12-17 09:40:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:05,463 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 209 transitions. [2021-12-17 09:40:05,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 209 transitions. [2021-12-17 09:40:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 09:40:05,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:05,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:05,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:05,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:05,699 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1275455806, now seen corresponding path program 1 times [2021-12-17 09:40:05,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:05,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901461418] [2021-12-17 09:40:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:05,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 09:40:05,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901461418] [2021-12-17 09:40:05,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901461418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562930593] [2021-12-17 09:40:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:05,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:05,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:05,780 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) [2021-12-17 09:40:05,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 09:40:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 09:40:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 09:40:05,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 09:40:06,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562930593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:06,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:06,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 13 [2021-12-17 09:40:06,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827129360] [2021-12-17 09:40:06,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:06,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:40:06,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:40:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:40:06,081 INFO L87 Difference]: Start difference. First operand 162 states and 209 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:06,990 INFO L93 Difference]: Finished difference Result 882 states and 1255 transitions. [2021-12-17 09:40:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 09:40:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-17 09:40:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:06,993 INFO L225 Difference]: With dead ends: 882 [2021-12-17 09:40:06,993 INFO L226 Difference]: Without dead ends: 731 [2021-12-17 09:40:06,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=433, Invalid=1547, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 09:40:06,995 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 873 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:06,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 534 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 09:40:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-17 09:40:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 248. [2021-12-17 09:40:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.3076923076923077) internal successors, (323), 247 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 323 transitions. [2021-12-17 09:40:07,021 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 323 transitions. Word has length 49 [2021-12-17 09:40:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:07,021 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 323 transitions. [2021-12-17 09:40:07,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 323 transitions. [2021-12-17 09:40:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 09:40:07,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:07,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:07,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:07,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:07,236 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1476472032, now seen corresponding path program 2 times [2021-12-17 09:40:07,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:07,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725763970] [2021-12-17 09:40:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:07,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-17 09:40:07,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725763970] [2021-12-17 09:40:07,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725763970] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700006505] [2021-12-17 09:40:07,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:40:07,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:07,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:07,313 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) [2021-12-17 09:40:07,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 09:40:07,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:40:07,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:40:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 09:40:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-17 09:40:07,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-17 09:40:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700006505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:07,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:07,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2021-12-17 09:40:07,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822848492] [2021-12-17 09:40:07,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:07,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 09:40:07,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 09:40:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-12-17 09:40:07,763 INFO L87 Difference]: Start difference. First operand 248 states and 323 transitions. Second operand has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:09,793 INFO L93 Difference]: Finished difference Result 1342 states and 1877 transitions. [2021-12-17 09:40:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-17 09:40:09,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-17 09:40:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:09,797 INFO L225 Difference]: With dead ends: 1342 [2021-12-17 09:40:09,797 INFO L226 Difference]: Without dead ends: 1107 [2021-12-17 09:40:09,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1095, Invalid=5877, Unknown=0, NotChecked=0, Total=6972 [2021-12-17 09:40:09,804 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 1151 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:09,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 2027 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 09:40:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-12-17 09:40:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 346. [2021-12-17 09:40:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.3130434782608695) internal successors, (453), 345 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 453 transitions. [2021-12-17 09:40:09,833 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 453 transitions. Word has length 69 [2021-12-17 09:40:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:09,833 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 453 transitions. [2021-12-17 09:40:09,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 453 transitions. [2021-12-17 09:40:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 09:40:09,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:09,834 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:09,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:10,049 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,SelfDestructingSolverStorable9 [2021-12-17 09:40:10,050 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 646144094, now seen corresponding path program 3 times [2021-12-17 09:40:10,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:10,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839730879] [2021-12-17 09:40:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:10,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-17 09:40:10,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:10,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839730879] [2021-12-17 09:40:10,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839730879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423103912] [2021-12-17 09:40:10,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:40:10,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:10,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:10,193 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) [2021-12-17 09:40:10,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 09:40:10,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 09:40:10,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:40:10,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 09:40:10,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-17 09:40:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-17 09:40:10,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423103912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:10,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:10,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2021-12-17 09:40:10,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469370633] [2021-12-17 09:40:10,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:10,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 09:40:10,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 09:40:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-17 09:40:10,906 INFO L87 Difference]: Start difference. First operand 346 states and 453 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:13,036 INFO L93 Difference]: Finished difference Result 2347 states and 3111 transitions. [2021-12-17 09:40:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 09:40:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-17 09:40:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:13,045 INFO L225 Difference]: With dead ends: 2347 [2021-12-17 09:40:13,045 INFO L226 Difference]: Without dead ends: 2016 [2021-12-17 09:40:13,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-12-17 09:40:13,047 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1131 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:13,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 638 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 09:40:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-12-17 09:40:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 362. [2021-12-17 09:40:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.3019390581717452) internal successors, (470), 361 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 470 transitions. [2021-12-17 09:40:13,081 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 470 transitions. Word has length 89 [2021-12-17 09:40:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:13,081 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 470 transitions. [2021-12-17 09:40:13,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 470 transitions. [2021-12-17 09:40:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 09:40:13,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:13,083 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:13,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-17 09:40:13,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:13,292 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash 64411734, now seen corresponding path program 4 times [2021-12-17 09:40:13,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:13,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210932692] [2021-12-17 09:40:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:13,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-12-17 09:40:14,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210932692] [2021-12-17 09:40:14,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210932692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175925675] [2021-12-17 09:40:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:40:14,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:14,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:14,100 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) [2021-12-17 09:40:14,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 09:40:14,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:40:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:40:14,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 09:40:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 09:40:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:14,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-17 09:40:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-17 09:40:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:18,786 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296))))) (or (< .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse2) (<= .cse2 2147483647) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) is different from false [2021-12-17 09:40:19,026 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296)))) (.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse2) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0) (<= .cse2 2147483647) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) is different from false [2021-12-17 09:40:19,290 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse1 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296)))) (.cse0 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse0) (< .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< (select .cse2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse1) (<= .cse0 2147483647) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) is different from false [2021-12-17 09:40:19,655 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse1 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296)))) (.cse0 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse0) (< .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< (select .cse2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse1) (<= .cse0 2147483647) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) is different from false [2021-12-17 09:40:19,712 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse1 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296)))) (.cse0 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse0) (< .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< (select .cse2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse1) (<= .cse0 2147483647) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) is different from false [2021-12-17 09:40:19,778 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse1 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296)))) (.cse0 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse0) (< .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< (select .cse2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse1) (<= .cse0 2147483647) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) is different from false [2021-12-17 09:40:19,845 WARN L838 $PredicateComparison]: unable to prove that (or (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 2) 4294967296)) (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse1 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296)))) (.cse0 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse0) (< .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< (select .cse2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse1) (<= .cse0 2147483647) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) is different from false [2021-12-17 09:40:19,912 WARN L838 $PredicateComparison]: unable to prove that (or (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 2) 4294967296)) (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (- 4294967296))))) (or (< .cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (<= 4294967296 .cse2) (<= .cse2 2147483647) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647)))) (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (v_ArrVal_309 (Array Int Int))) (let ((.cse4 (select v_ArrVal_309 (+ (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) |c_ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse4) (< 2147483647 .cse5) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< .cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 2))) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< .cse5 0))))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) is different from false [2021-12-17 09:40:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 183 trivial. 78 not checked. [2021-12-17 09:40:19,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175925675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:40:19,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:40:19,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 21] total 47 [2021-12-17 09:40:19,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889689073] [2021-12-17 09:40:19,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:40:19,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 09:40:19,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:40:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 09:40:19,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1307, Unknown=8, NotChecked=648, Total=2162 [2021-12-17 09:40:19,940 INFO L87 Difference]: Start difference. First operand 362 states and 470 transitions. Second operand has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:40:27,131 INFO L93 Difference]: Finished difference Result 1116 states and 1462 transitions. [2021-12-17 09:40:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-17 09:40:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 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 97 [2021-12-17 09:40:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:40:27,134 INFO L225 Difference]: With dead ends: 1116 [2021-12-17 09:40:27,134 INFO L226 Difference]: Without dead ends: 972 [2021-12-17 09:40:27,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 166 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 7735 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2402, Invalid=23062, Unknown=8, NotChecked=2584, Total=28056 [2021-12-17 09:40:27,141 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 600 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 5956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3086 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 09:40:27,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 1842 Invalid, 5956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2672 Invalid, 0 Unknown, 3086 Unchecked, 1.4s Time] [2021-12-17 09:40:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-12-17 09:40:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 809. [2021-12-17 09:40:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.3106435643564356) internal successors, (1059), 808 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1059 transitions. [2021-12-17 09:40:27,215 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1059 transitions. Word has length 97 [2021-12-17 09:40:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:40:27,216 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 1059 transitions. [2021-12-17 09:40:27,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:40:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1059 transitions. [2021-12-17 09:40:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 09:40:27,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:40:27,217 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:40:27,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 09:40:27,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 09:40:27,425 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:40:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:40:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash 980530326, now seen corresponding path program 1 times [2021-12-17 09:40:27,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:40:27,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813194362] [2021-12-17 09:40:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:27,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:40:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-17 09:40:28,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:40:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813194362] [2021-12-17 09:40:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813194362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:40:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225348516] [2021-12-17 09:40:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:40:28,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:40:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:40:28,066 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) [2021-12-17 09:40:28,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 09:40:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:40:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 09:40:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:40:40,725 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-12-17 09:40:40,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-12-17 09:40:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-17 09:40:41,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:40:44,320 INFO L354 Elim1Store]: treesize reduction 145, result has 70.0 percent of original size [2021-12-17 09:40:44,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 437 [2021-12-17 09:52:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-12-17 09:52:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225348516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:14,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:14,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 45 [2021-12-17 09:52:14,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847913683] [2021-12-17 09:52:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:14,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 09:52:14,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 09:52:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 09:52:14,837 INFO L87 Difference]: Start difference. First operand 809 states and 1059 transitions. Second operand has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:52:33,781 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 70 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 09:52:50,521 WARN L227 SmtUtils]: Spent 16.12s on a formula simplification. DAG size of input: 80 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 09:52:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:53,225 INFO L93 Difference]: Finished difference Result 1889 states and 2494 transitions. [2021-12-17 09:52:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-17 09:52:53,226 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-17 09:52:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:53,230 INFO L225 Difference]: With dead ends: 1889 [2021-12-17 09:52:53,230 INFO L226 Difference]: Without dead ends: 1373 [2021-12-17 09:52:53,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5785 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=1526, Invalid=16834, Unknown=0, NotChecked=0, Total=18360 [2021-12-17 09:52:53,236 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 363 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1028 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:53,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 1412 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1561 Invalid, 0 Unknown, 1028 Unchecked, 1.0s Time] [2021-12-17 09:52:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-12-17 09:52:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1164. [2021-12-17 09:52:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 1.3078245915735167) internal successors, (1521), 1163 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:52:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1521 transitions. [2021-12-17 09:52:53,324 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1521 transitions. Word has length 97 [2021-12-17 09:52:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:53,324 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 1521 transitions. [2021-12-17 09:52:53,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:52:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1521 transitions. [2021-12-17 09:52:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 09:52:53,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:53,326 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:53,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-17 09:52:53,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 09:52:53,543 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:53,543 INFO L85 PathProgramCache]: Analyzing trace with hash 563531286, now seen corresponding path program 2 times [2021-12-17 09:52:53,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399134188] [2021-12-17 09:52:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:53,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-17 09:52:54,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399134188] [2021-12-17 09:52:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399134188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632137517] [2021-12-17 09:52:54,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:52:54,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:54,112 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) [2021-12-17 09:52:54,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 09:52:54,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:52:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:52:54,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 09:52:54,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:56,468 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-12-17 09:52:56,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-12-17 09:53:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-17 09:53:10,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:53:13,334 INFO L354 Elim1Store]: treesize reduction 145, result has 70.0 percent of original size [2021-12-17 09:53:13,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 437 Killed by 15