./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label54.c -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 424888782994589c8561c25cda4374fd19e99e64fb7f98bc75388be44be96662 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:09:49,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:09:49,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:09:49,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:09:49,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:09:49,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:09:49,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:09:49,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:09:49,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:09:49,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:09:49,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:09:49,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:09:49,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:09:49,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:09:49,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:09:49,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:09:49,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:09:49,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:09:49,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:09:49,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:09:49,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:09:49,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:09:49,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:09:49,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:09:49,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:09:49,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:09:49,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:09:49,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:09:49,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:09:49,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:09:49,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:09:49,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:09:49,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:09:49,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:09:49,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:09:49,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:09:49,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:09:49,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:09:49,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:09:49,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:09:49,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:09:49,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:09:49,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:09:49,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:09:49,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:09:49,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:09:49,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:09:49,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:09:49,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:09:49,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:09:49,496 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:09:49,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:09:49,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:09:49,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:09:49,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:09:49,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:09:49,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:09:49,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:09:49,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:09:49,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:09:49,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:09:49,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:09:49,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:09:49,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:09:49,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:09:49,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:09:49,501 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:09:49,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:09:49,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:09:49,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:09:49,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 424888782994589c8561c25cda4374fd19e99e64fb7f98bc75388be44be96662 [2021-12-15 10:09:49,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:09:49,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:09:49,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:09:49,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:09:49,713 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:09:49,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label54.c [2021-12-15 10:09:49,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a698d85/1112bb304179429a97953b33ef9ff26e/FLAGba4f325e3 [2021-12-15 10:09:50,683 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:09:50,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label54.c [2021-12-15 10:09:50,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a698d85/1112bb304179429a97953b33ef9ff26e/FLAGba4f325e3 [2021-12-15 10:09:50,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a698d85/1112bb304179429a97953b33ef9ff26e [2021-12-15 10:09:50,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:09:50,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:09:50,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:09:50,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:09:50,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:09:50,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:09:50" (1/1) ... [2021-12-15 10:09:50,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d224e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:50, skipping insertion in model container [2021-12-15 10:09:50,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:09:50" (1/1) ... [2021-12-15 10:09:50,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:09:50,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:09:51,140 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/eca-rers2012/Problem19_label54.c[8269,8282] [2021-12-15 10:09:52,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:09:52,251 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:09:52,286 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/eca-rers2012/Problem19_label54.c[8269,8282] [2021-12-15 10:09:52,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:09:52,860 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:09:52,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52 WrapperNode [2021-12-15 10:09:52,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:09:52,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:09:52,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:09:52,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:09:52,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:52,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:53,734 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-15 10:09:53,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:09:53,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:09:53,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:09:53,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:09:53,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:53,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:53,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:53,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:54,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:54,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:54,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:54,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:09:54,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:09:54,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:09:54,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:09:54,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (1/1) ... [2021-12-15 10:09:54,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:09:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:09:54,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:09:54,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:09:54,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:09:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:09:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:09:54,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:09:54,912 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:09:54,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:10:00,493 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:10:00,506 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:10:00,507 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:10:00,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:10:00 BoogieIcfgContainer [2021-12-15 10:10:00,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:10:00,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:10:00,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:10:00,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:10:00,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:09:50" (1/3) ... [2021-12-15 10:10:00,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f1614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:10:00, skipping insertion in model container [2021-12-15 10:10:00,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:09:52" (2/3) ... [2021-12-15 10:10:00,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f1614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:10:00, skipping insertion in model container [2021-12-15 10:10:00,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:10:00" (3/3) ... [2021-12-15 10:10:00,516 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label54.c [2021-12-15 10:10:00,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:10:00,520 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:10:00,556 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:10:00,562 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 [2021-12-15 10:10:00,562 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:10:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 10:10:00,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:00,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:00,597 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-12-15 10:10:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:00,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348104630] [2021-12-15 10:10:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:00,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:10:00,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348104630] [2021-12-15 10:10:00,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348104630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:00,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:00,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:10:00,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794942469] [2021-12-15 10:10:00,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:00,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:00,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:00,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:00,813 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:07,178 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-15 10:10:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 10:10:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:07,225 INFO L225 Difference]: With dead ends: 4957 [2021-12-15 10:10:07,225 INFO L226 Difference]: Without dead ends: 3129 [2021-12-15 10:10:07,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:07,241 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1562 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:07,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-15 10:10:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-15 10:10:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-15 10:10:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-15 10:10:07,359 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 64 [2021-12-15 10:10:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:07,359 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-15 10:10:07,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-15 10:10:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-15 10:10:07,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:07,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:07,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:10:07,363 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1504498088, now seen corresponding path program 1 times [2021-12-15 10:10:07,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:07,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312455940] [2021-12-15 10:10:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:07,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:10:07,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312455940] [2021-12-15 10:10:07,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312455940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:07,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:07,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:10:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486948494] [2021-12-15 10:10:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:07,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:07,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:07,435 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:12,805 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2021-12-15 10:10:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-15 10:10:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:12,833 INFO L225 Difference]: With dead ends: 9153 [2021-12-15 10:10:12,833 INFO L226 Difference]: Without dead ends: 6047 [2021-12-15 10:10:12,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:12,840 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1783 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:12,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 1618 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 10:10:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-12-15 10:10:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2021-12-15 10:10:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 1.4029850746268657) internal successors, (8460), 6030 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2021-12-15 10:10:12,918 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 131 [2021-12-15 10:10:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:12,920 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2021-12-15 10:10:12,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2021-12-15 10:10:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 10:10:12,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:12,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:12,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:10:12,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash -87284308, now seen corresponding path program 1 times [2021-12-15 10:10:12,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:12,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241461913] [2021-12-15 10:10:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:12,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:10:13,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241461913] [2021-12-15 10:10:13,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241461913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:13,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:13,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:10:13,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321813348] [2021-12-15 10:10:13,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:13,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:10:13,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:10:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:10:13,077 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:21,929 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2021-12-15 10:10:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:10:21,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-15 10:10:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:21,965 INFO L225 Difference]: With dead ends: 19026 [2021-12-15 10:10:21,965 INFO L226 Difference]: Without dead ends: 12997 [2021-12-15 10:10:21,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:10:21,980 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4259 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 9633 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4259 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 10839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:21,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4259 Valid, 1208 Invalid, 10839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9633 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-12-15 10:10:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2021-12-15 10:10:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2021-12-15 10:10:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.3460883036405886) internal successors, (17378), 12910 states have internal predecessors, (17378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17378 transitions. [2021-12-15 10:10:22,209 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17378 transitions. Word has length 133 [2021-12-15 10:10:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:22,210 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17378 transitions. [2021-12-15 10:10:22,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17378 transitions. [2021-12-15 10:10:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-15 10:10:22,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:22,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:22,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:10:22,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2002071597, now seen corresponding path program 1 times [2021-12-15 10:10:22,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:22,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771332963] [2021-12-15 10:10:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:22,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 10:10:22,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771332963] [2021-12-15 10:10:22,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771332963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:22,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:22,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:10:22,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589268806] [2021-12-15 10:10:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:22,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:10:22,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:10:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:10:22,490 INFO L87 Difference]: Start difference. First operand 12911 states and 17378 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:27,433 INFO L93 Difference]: Finished difference Result 24486 states and 33408 transitions. [2021-12-15 10:10:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:10:27,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 368 [2021-12-15 10:10:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:27,470 INFO L225 Difference]: With dead ends: 24486 [2021-12-15 10:10:27,470 INFO L226 Difference]: Without dead ends: 12911 [2021-12-15 10:10:27,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:10:27,482 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:27,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1950 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-15 10:10:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-12-15 10:10:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2021-12-15 10:10:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.345391169635941) internal successors, (17369), 12910 states have internal predecessors, (17369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17369 transitions. [2021-12-15 10:10:27,662 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17369 transitions. Word has length 368 [2021-12-15 10:10:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:27,663 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17369 transitions. [2021-12-15 10:10:27,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17369 transitions. [2021-12-15 10:10:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-12-15 10:10:27,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:27,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:27,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:10:27,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1473681668, now seen corresponding path program 1 times [2021-12-15 10:10:27,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:27,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135877679] [2021-12-15 10:10:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:27,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 10:10:27,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135877679] [2021-12-15 10:10:27,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135877679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:10:27,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620243840] [2021-12-15 10:10:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:10:27,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:10:27,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:10:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:10:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:10:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-15 10:10:29,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:10:29,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620243840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:29,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:10:29,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 10:10:29,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506784270] [2021-12-15 10:10:29,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:29,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:29,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:29,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:10:29,075 INFO L87 Difference]: Start difference. First operand 12911 states and 17369 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:34,964 INFO L93 Difference]: Finished difference Result 35414 states and 48543 transitions. [2021-12-15 10:10:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:34,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 551 [2021-12-15 10:10:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:35,005 INFO L225 Difference]: With dead ends: 35414 [2021-12-15 10:10:35,005 INFO L226 Difference]: Without dead ends: 23870 [2021-12-15 10:10:35,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:10:35,017 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 1007 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4888 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 5915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 4888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:35,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 1771 Invalid, 5915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 4888 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-15 10:10:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23870 states. [2021-12-15 10:10:35,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23870 to 23866. [2021-12-15 10:10:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23866 states, 23865 states have (on average 1.2675466163838256) internal successors, (30250), 23865 states have internal predecessors, (30250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23866 states to 23866 states and 30250 transitions. [2021-12-15 10:10:35,274 INFO L78 Accepts]: Start accepts. Automaton has 23866 states and 30250 transitions. Word has length 551 [2021-12-15 10:10:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:35,275 INFO L470 AbstractCegarLoop]: Abstraction has 23866 states and 30250 transitions. [2021-12-15 10:10:35,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 23866 states and 30250 transitions. [2021-12-15 10:10:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2021-12-15 10:10:35,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:35,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:35,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:10:35,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:35,500 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1593275233, now seen corresponding path program 1 times [2021-12-15 10:10:35,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:35,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134769979] [2021-12-15 10:10:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:35,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 10:10:35,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:35,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134769979] [2021-12-15 10:10:35,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134769979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:35,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:10:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175412989] [2021-12-15 10:10:35,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:35,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:35,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:35,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:35,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:35,704 INFO L87 Difference]: Start difference. First operand 23866 states and 30250 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:40,554 INFO L93 Difference]: Finished difference Result 55931 states and 70566 transitions. [2021-12-15 10:10:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 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 616 [2021-12-15 10:10:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:40,614 INFO L225 Difference]: With dead ends: 55931 [2021-12-15 10:10:40,614 INFO L226 Difference]: Without dead ends: 33432 [2021-12-15 10:10:40,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:10:40,639 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:40,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-15 10:10:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33432 states. [2021-12-15 10:10:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33432 to 33422. [2021-12-15 10:10:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33422 states, 33421 states have (on average 1.2002333861943089) internal successors, (40113), 33421 states have internal predecessors, (40113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33422 states to 33422 states and 40113 transitions. [2021-12-15 10:10:41,130 INFO L78 Accepts]: Start accepts. Automaton has 33422 states and 40113 transitions. Word has length 616 [2021-12-15 10:10:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:41,131 INFO L470 AbstractCegarLoop]: Abstraction has 33422 states and 40113 transitions. [2021-12-15 10:10:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 33422 states and 40113 transitions. [2021-12-15 10:10:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2021-12-15 10:10:41,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:41,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:41,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:10:41,142 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash 433916080, now seen corresponding path program 1 times [2021-12-15 10:10:41,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:41,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055426255] [2021-12-15 10:10:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:41,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 274 proven. 44 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-15 10:10:41,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055426255] [2021-12-15 10:10:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055426255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:10:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134768128] [2021-12-15 10:10:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:41,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:10:41,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:10:41,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:10:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:10:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:10:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-15 10:10:42,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:10:42,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134768128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:42,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:10:42,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 10:10:42,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125880637] [2021-12-15 10:10:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:42,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:42,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:10:42,417 INFO L87 Difference]: Start difference. First operand 33422 states and 40113 transitions. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:47,308 INFO L93 Difference]: Finished difference Result 96875 states and 116720 transitions. [2021-12-15 10:10:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 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 687 [2021-12-15 10:10:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:47,416 INFO L225 Difference]: With dead ends: 96875 [2021-12-15 10:10:47,416 INFO L226 Difference]: Without dead ends: 64820 [2021-12-15 10:10:47,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:10:47,449 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 2530 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2530 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 5519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:47,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2530 Valid, 809 Invalid, 5519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4047 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-15 10:10:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64820 states. [2021-12-15 10:10:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64820 to 59356. [2021-12-15 10:10:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59356 states, 59355 states have (on average 1.1873304692106814) internal successors, (70474), 59355 states have internal predecessors, (70474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59356 states to 59356 states and 70474 transitions. [2021-12-15 10:10:48,150 INFO L78 Accepts]: Start accepts. Automaton has 59356 states and 70474 transitions. Word has length 687 [2021-12-15 10:10:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:48,152 INFO L470 AbstractCegarLoop]: Abstraction has 59356 states and 70474 transitions. [2021-12-15 10:10:48,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 59356 states and 70474 transitions. [2021-12-15 10:10:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2021-12-15 10:10:48,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:48,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:48,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:10:48,379 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,SelfDestructingSolverStorable6 [2021-12-15 10:10:48,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1624119633, now seen corresponding path program 1 times [2021-12-15 10:10:48,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:48,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120419437] [2021-12-15 10:10:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:48,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 23 proven. 100 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-15 10:10:48,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120419437] [2021-12-15 10:10:48,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120419437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:10:48,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615831928] [2021-12-15 10:10:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:48,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:48,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:10:48,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:10:48,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:10:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:10:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:10:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-15 10:10:49,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:10:49,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615831928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:49,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:10:49,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 10:10:49,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822625272] [2021-12-15 10:10:49,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:49,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:10:49,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:49,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:10:49,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:10:49,660 INFO L87 Difference]: Start difference. First operand 59356 states and 70474 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:10:54,366 INFO L93 Difference]: Finished difference Result 135113 states and 162532 transitions. [2021-12-15 10:10:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:10:54,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 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 749 [2021-12-15 10:10:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:10:54,464 INFO L225 Difference]: With dead ends: 135113 [2021-12-15 10:10:54,467 INFO L226 Difference]: Without dead ends: 77124 [2021-12-15 10:10:54,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:10:54,498 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 1373 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3748 mSolverCounterSat, 1637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1637 IncrementalHoareTripleChecker+Valid, 3748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:10:54,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 3326 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1637 Valid, 3748 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-15 10:10:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77124 states. [2021-12-15 10:10:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77124 to 75753. [2021-12-15 10:10:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 1.1629659942971802) internal successors, (88097), 75752 states have internal predecessors, (88097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 88097 transitions. [2021-12-15 10:10:55,218 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 88097 transitions. Word has length 749 [2021-12-15 10:10:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:10:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 75753 states and 88097 transitions. [2021-12-15 10:10:55,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:10:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 88097 transitions. [2021-12-15 10:10:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-12-15 10:10:55,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:10:55,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:10:55,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:10:55,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:10:55,442 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:10:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:10:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash -901720990, now seen corresponding path program 1 times [2021-12-15 10:10:55,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:10:55,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226481534] [2021-12-15 10:10:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:10:55,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:10:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:10:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-15 10:10:56,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:10:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226481534] [2021-12-15 10:10:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226481534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:10:56,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:10:56,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:10:56,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365036433] [2021-12-15 10:10:56,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:10:56,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:10:56,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:10:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:10:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:10:56,073 INFO L87 Difference]: Start difference. First operand 75753 states and 88097 transitions. Second operand has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)