./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label14.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/Problem15_label14.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 970a84593c0bec11fea8b95335966215ba468481b559446652c2d60f98ba63c5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:50:01,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:50:01,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:50:01,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:50:01,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:50:01,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:50:01,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:50:01,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:50:01,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:50:01,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:50:01,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:50:01,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:50:01,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:50:01,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:50:01,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:50:01,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:50:01,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:50:01,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:50:01,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:50:01,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:50:01,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:50:01,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:50:01,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:50:01,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:50:01,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:50:01,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:50:01,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:50:01,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:50:01,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:50:01,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:50:01,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:50:01,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:50:01,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:50:01,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:50:01,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:50:01,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:50:01,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:50:01,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:50:01,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:50:01,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:50:01,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:50:01,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:50:01,722 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:50:01,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:50:01,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:50:01,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:50:01,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:50:01,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:50:01,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:50:01,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:50:01,726 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:50:01,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:50:01,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:50:01,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:50:01,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:50:01,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:50:01,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:50:01,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:50:01,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:50:01,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:50:01,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:50:01,728 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:50:01,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:50:01,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:50:01,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:50:01,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:50:01,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:50:01,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:50:01,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:50:01,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:50:01,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:50:01,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:50:01,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:50:01,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:50:01,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:50:01,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:50:01,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 970a84593c0bec11fea8b95335966215ba468481b559446652c2d60f98ba63c5 [2021-12-15 09:50:01,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:50:01,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:50:01,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:50:01,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:50:01,981 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:50:01,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label14.c [2021-12-15 09:50:02,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6cd90be1/ffafee07fa1b4da592987cd589a369f3/FLAG75b179428 [2021-12-15 09:50:02,661 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:50:02,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label14.c [2021-12-15 09:50:02,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6cd90be1/ffafee07fa1b4da592987cd589a369f3/FLAG75b179428 [2021-12-15 09:50:02,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6cd90be1/ffafee07fa1b4da592987cd589a369f3 [2021-12-15 09:50:02,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:50:02,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:50:02,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:50:02,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:50:02,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:50:02,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:50:02" (1/1) ... [2021-12-15 09:50:02,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d137db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:02, skipping insertion in model container [2021-12-15 09:50:02,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:50:02" (1/1) ... [2021-12-15 09:50:02,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:50:02,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:50:03,088 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/Problem15_label14.c[2008,2021] [2021-12-15 09:50:03,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:50:03,473 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:50:03,485 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/Problem15_label14.c[2008,2021] [2021-12-15 09:50:03,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:50:03,666 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:50:03,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03 WrapperNode [2021-12-15 09:50:03,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:50:03,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:50:03,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:50:03,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:50:03,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,883 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 09:50:03,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:50:03,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:50:03,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:50:03,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:50:03,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:03,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:04,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:04,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:50:04,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:50:04,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:50:04,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:50:04,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (1/1) ... [2021-12-15 09:50:04,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:50:04,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:04,191 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 09:50:04,275 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 09:50:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:50:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:50:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:50:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:50:04,410 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:50:04,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:50:06,532 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:50:06,546 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:50:06,549 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:50:06,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:50:06 BoogieIcfgContainer [2021-12-15 09:50:06,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:50:06,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:50:06,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:50:06,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:50:06,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:50:02" (1/3) ... [2021-12-15 09:50:06,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a52af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:50:06, skipping insertion in model container [2021-12-15 09:50:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:03" (2/3) ... [2021-12-15 09:50:06,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a52af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:50:06, skipping insertion in model container [2021-12-15 09:50:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:50:06" (3/3) ... [2021-12-15 09:50:06,560 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2021-12-15 09:50:06,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:50:06,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:50:06,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:50:06,626 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 09:50:06,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:50:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 09:50:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 09:50:06,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:06,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:50:06,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:06,680 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-12-15 09:50:06,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:06,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866957223] [2021-12-15 09:50:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:06,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:06,865 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 09:50:06,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866957223] [2021-12-15 09:50:06,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866957223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:06,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:06,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:50:06,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614146944] [2021-12-15 09:50:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:06,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:06,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:06,903 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:09,012 INFO L93 Difference]: Finished difference Result 1191 states and 2157 transitions. [2021-12-15 09:50:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 09:50:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:09,039 INFO L225 Difference]: With dead ends: 1191 [2021-12-15 09:50:09,042 INFO L226 Difference]: Without dead ends: 688 [2021-12-15 09:50:09,051 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 09:50:09,059 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 356 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:09,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 230 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:50:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-15 09:50:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 680. [2021-12-15 09:50:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.609720176730486) internal successors, (1093), 679 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states 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 09:50:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1093 transitions. [2021-12-15 09:50:09,146 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1093 transitions. Word has length 15 [2021-12-15 09:50:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:09,147 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1093 transitions. [2021-12-15 09:50:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1093 transitions. [2021-12-15 09:50:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 09:50:09,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:09,150 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:50:09,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:50:09,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:09,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1737686017, now seen corresponding path program 1 times [2021-12-15 09:50:09,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:09,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30113487] [2021-12-15 09:50:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:09,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:09,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:09,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30113487] [2021-12-15 09:50:09,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30113487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:09,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:09,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:50:09,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137749970] [2021-12-15 09:50:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:09,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:09,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:09,261 INFO L87 Difference]: Start difference. First operand 680 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:10,661 INFO L93 Difference]: Finished difference Result 1964 states and 3171 transitions. [2021-12-15 09:50:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 09:50:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:10,668 INFO L225 Difference]: With dead ends: 1964 [2021-12-15 09:50:10,669 INFO L226 Difference]: Without dead ends: 1286 [2021-12-15 09:50:10,670 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 09:50:10,671 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 282 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:10,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 360 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:50:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-12-15 09:50:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1281. [2021-12-15 09:50:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 1.3953125) internal successors, (1786), 1280 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states 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 09:50:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1786 transitions. [2021-12-15 09:50:10,701 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1786 transitions. Word has length 83 [2021-12-15 09:50:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:10,701 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1786 transitions. [2021-12-15 09:50:10,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1786 transitions. [2021-12-15 09:50:10,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 09:50:10,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:10,704 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:50:10,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:50:10,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash -479501163, now seen corresponding path program 1 times [2021-12-15 09:50:10,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:10,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780464532] [2021-12-15 09:50:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:10,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:10,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:10,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780464532] [2021-12-15 09:50:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780464532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:10,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:10,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:50:10,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195493109] [2021-12-15 09:50:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:10,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:10,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:10,817 INFO L87 Difference]: Start difference. First operand 1281 states and 1786 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:12,351 INFO L93 Difference]: Finished difference Result 2859 states and 3905 transitions. [2021-12-15 09:50:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-15 09:50:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:12,358 INFO L225 Difference]: With dead ends: 2859 [2021-12-15 09:50:12,359 INFO L226 Difference]: Without dead ends: 1580 [2021-12-15 09:50:12,361 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 09:50:12,362 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 225 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:12,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 359 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:50:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-15 09:50:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2021-12-15 09:50:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 1.3242558581380621) internal successors, (2091), 1579 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states 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 09:50:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2091 transitions. [2021-12-15 09:50:12,390 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2091 transitions. Word has length 91 [2021-12-15 09:50:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:12,391 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2091 transitions. [2021-12-15 09:50:12,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2091 transitions. [2021-12-15 09:50:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-15 09:50:12,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:12,395 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:50:12,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:50:12,395 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:12,396 INFO L85 PathProgramCache]: Analyzing trace with hash -33375318, now seen corresponding path program 1 times [2021-12-15 09:50:12,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:12,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302225063] [2021-12-15 09:50:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:12,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:12,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:12,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302225063] [2021-12-15 09:50:12,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302225063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:12,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220563723] [2021-12-15 09:50:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:12,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:12,607 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 09:50:12,623 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 09:50:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:12,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:50:12,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 76 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:13,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:50:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 76 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:14,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220563723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:50:14,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:50:14,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-15 09:50:14,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553693499] [2021-12-15 09:50:14,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:50:14,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 09:50:14,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 09:50:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:50:14,729 INFO L87 Difference]: Start difference. First operand 1580 states and 2091 transitions. Second operand has 10 states, 10 states have (on average 49.4) internal successors, (494), 9 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 09:50:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:21,415 INFO L93 Difference]: Finished difference Result 8776 states and 12092 transitions. [2021-12-15 09:50:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 09:50:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 49.4) internal successors, (494), 9 states have internal predecessors, (494), 0 states have call successors, (0), 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 182 [2021-12-15 09:50:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:21,433 INFO L225 Difference]: With dead ends: 8776 [2021-12-15 09:50:21,433 INFO L226 Difference]: Without dead ends: 4595 [2021-12-15 09:50:21,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-12-15 09:50:21,438 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 3878 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 6561 mSolverCounterSat, 1108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3878 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 7669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1108 IncrementalHoareTripleChecker+Valid, 6561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:21,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3878 Valid, 332 Invalid, 7669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1108 Valid, 6561 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-15 09:50:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2021-12-15 09:50:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4275. [2021-12-15 09:50:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 1.1445952269536734) internal successors, (4892), 4274 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states 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 09:50:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 4892 transitions. [2021-12-15 09:50:21,512 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 4892 transitions. Word has length 182 [2021-12-15 09:50:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:21,512 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 4892 transitions. [2021-12-15 09:50:21,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.4) internal successors, (494), 9 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 09:50:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 4892 transitions. [2021-12-15 09:50:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-15 09:50:21,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:21,516 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:50:21,544 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 09:50:21,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:21,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash -588182164, now seen corresponding path program 1 times [2021-12-15 09:50:21,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:21,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119138373] [2021-12-15 09:50:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:21,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:22,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:22,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119138373] [2021-12-15 09:50:22,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119138373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:22,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085314556] [2021-12-15 09:50:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:22,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:22,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:22,057 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 09:50:22,095 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 09:50:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:22,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:50:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 09:50:22,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:50:22,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085314556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:22,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:50:22,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:50:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384981863] [2021-12-15 09:50:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:22,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:22,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:50:22,768 INFO L87 Difference]: Start difference. First operand 4275 states and 4892 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:23,848 INFO L93 Difference]: Finished difference Result 9452 states and 10966 transitions. [2021-12-15 09:50:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2021-12-15 09:50:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:23,868 INFO L225 Difference]: With dead ends: 9452 [2021-12-15 09:50:23,869 INFO L226 Difference]: Without dead ends: 5478 [2021-12-15 09:50:23,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:50:23,876 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 31 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:23,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 258 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:50:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-12-15 09:50:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5475. [2021-12-15 09:50:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5474 states have (on average 1.1275118743149433) internal successors, (6172), 5474 states have internal predecessors, (6172), 0 states have call successors, (0), 0 states 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 09:50:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 6172 transitions. [2021-12-15 09:50:23,974 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 6172 transitions. Word has length 297 [2021-12-15 09:50:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:23,976 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 6172 transitions. [2021-12-15 09:50:23,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 6172 transitions. [2021-12-15 09:50:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-15 09:50:23,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:23,981 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:24,006 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 09:50:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:24,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1535926930, now seen corresponding path program 1 times [2021-12-15 09:50:24,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:24,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888992658] [2021-12-15 09:50:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:24,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:24,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888992658] [2021-12-15 09:50:24,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888992658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719131067] [2021-12-15 09:50:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:24,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:24,597 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 09:50:24,606 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 09:50:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:50:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:50:25,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:50:25,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719131067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:25,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:50:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:50:25,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326690316] [2021-12-15 09:50:25,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:25,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:25,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:50:25,186 INFO L87 Difference]: Start difference. First operand 5475 states and 6172 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 09:50:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:26,296 INFO L93 Difference]: Finished difference Result 13353 states and 15203 transitions. [2021-12-15 09:50:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 361 [2021-12-15 09:50:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:26,314 INFO L225 Difference]: With dead ends: 13353 [2021-12-15 09:50:26,314 INFO L226 Difference]: Without dead ends: 7880 [2021-12-15 09:50:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:50:26,323 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 245 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:26,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 270 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:50:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2021-12-15 09:50:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 7277. [2021-12-15 09:50:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7276 states have (on average 1.1074766355140186) internal successors, (8058), 7276 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states 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 09:50:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 8058 transitions. [2021-12-15 09:50:26,441 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 8058 transitions. Word has length 361 [2021-12-15 09:50:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:26,441 INFO L470 AbstractCegarLoop]: Abstraction has 7277 states and 8058 transitions. [2021-12-15 09:50:26,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 09:50:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 8058 transitions. [2021-12-15 09:50:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-15 09:50:26,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:26,447 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:26,474 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 09:50:26,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:26,672 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1069631560, now seen corresponding path program 1 times [2021-12-15 09:50:26,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:26,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755218518] [2021-12-15 09:50:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:26,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 09:50:26,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755218518] [2021-12-15 09:50:26,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755218518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:26,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:26,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:26,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933212554] [2021-12-15 09:50:26,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:26,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:26,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:26,825 INFO L87 Difference]: Start difference. First operand 7277 states and 8058 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:50:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:27,817 INFO L93 Difference]: Finished difference Result 16349 states and 18317 transitions. [2021-12-15 09:50:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 392 [2021-12-15 09:50:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:27,839 INFO L225 Difference]: With dead ends: 16349 [2021-12-15 09:50:27,839 INFO L226 Difference]: Without dead ends: 9074 [2021-12-15 09:50:27,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:27,848 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 310 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:27,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 548 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:50:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2021-12-15 09:50:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 9072. [2021-12-15 09:50:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9072 states, 9071 states have (on average 1.086980487267115) internal successors, (9860), 9071 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states 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 09:50:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9072 states to 9072 states and 9860 transitions. [2021-12-15 09:50:27,974 INFO L78 Accepts]: Start accepts. Automaton has 9072 states and 9860 transitions. Word has length 392 [2021-12-15 09:50:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:27,975 INFO L470 AbstractCegarLoop]: Abstraction has 9072 states and 9860 transitions. [2021-12-15 09:50:27,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:50:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9072 states and 9860 transitions. [2021-12-15 09:50:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-15 09:50:27,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:27,984 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:27,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:50:27,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:27,985 INFO L85 PathProgramCache]: Analyzing trace with hash -270028145, now seen corresponding path program 1 times [2021-12-15 09:50:27,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:27,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813989381] [2021-12-15 09:50:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:27,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-15 09:50:28,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813989381] [2021-12-15 09:50:28,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813989381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:28,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:28,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:28,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255621718] [2021-12-15 09:50:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:28,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:28,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:28,185 INFO L87 Difference]: Start difference. First operand 9072 states and 9860 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:50:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:29,226 INFO L93 Difference]: Finished difference Result 18140 states and 19760 transitions. [2021-12-15 09:50:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 516 [2021-12-15 09:50:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:29,243 INFO L225 Difference]: With dead ends: 18140 [2021-12-15 09:50:29,244 INFO L226 Difference]: Without dead ends: 9369 [2021-12-15 09:50:29,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:29,252 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 438 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:29,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 70 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:50:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-12-15 09:50:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 9070. [2021-12-15 09:50:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9070 states, 9069 states have (on average 1.0867791377219098) internal successors, (9856), 9069 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states 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 09:50:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9070 states to 9070 states and 9856 transitions. [2021-12-15 09:50:29,359 INFO L78 Accepts]: Start accepts. Automaton has 9070 states and 9856 transitions. Word has length 516 [2021-12-15 09:50:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:29,360 INFO L470 AbstractCegarLoop]: Abstraction has 9070 states and 9856 transitions. [2021-12-15 09:50:29,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:50:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 9070 states and 9856 transitions. [2021-12-15 09:50:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-12-15 09:50:29,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:29,365 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:50:29,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1768140986, now seen corresponding path program 1 times [2021-12-15 09:50:29,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:29,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414860237] [2021-12-15 09:50:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:29,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-15 09:50:29,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414860237] [2021-12-15 09:50:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414860237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:29,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:29,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:29,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888998835] [2021-12-15 09:50:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:29,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:29,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:29,589 INFO L87 Difference]: Start difference. First operand 9070 states and 9856 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:30,754 INFO L93 Difference]: Finished difference Result 21156 states and 23016 transitions. [2021-12-15 09:50:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 542 [2021-12-15 09:50:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:30,774 INFO L225 Difference]: With dead ends: 21156 [2021-12-15 09:50:30,774 INFO L226 Difference]: Without dead ends: 12088 [2021-12-15 09:50:30,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:30,784 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 321 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:30,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 248 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:50:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12088 states. [2021-12-15 09:50:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12088 to 9671. [2021-12-15 09:50:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9671 states, 9670 states have (on average 1.0840744570837642) internal successors, (10483), 9670 states have internal predecessors, (10483), 0 states have call successors, (0), 0 states 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 09:50:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9671 states to 9671 states and 10483 transitions. [2021-12-15 09:50:30,904 INFO L78 Accepts]: Start accepts. Automaton has 9671 states and 10483 transitions. Word has length 542 [2021-12-15 09:50:30,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:30,905 INFO L470 AbstractCegarLoop]: Abstraction has 9671 states and 10483 transitions. [2021-12-15 09:50:30,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 9671 states and 10483 transitions. [2021-12-15 09:50:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-12-15 09:50:30,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:30,910 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:30,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:50:30,910 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash -240527515, now seen corresponding path program 1 times [2021-12-15 09:50:30,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:30,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678234953] [2021-12-15 09:50:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:30,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 176 proven. 13 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-15 09:50:31,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678234953] [2021-12-15 09:50:31,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678234953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657456232] [2021-12-15 09:50:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:31,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:31,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:31,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:50:31,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:50:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:50:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-15 09:50:32,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:50:32,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657456232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:32,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:50:32,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:50:32,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555115112] [2021-12-15 09:50:32,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:32,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:50:32,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:50:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:50:32,388 INFO L87 Difference]: Start difference. First operand 9671 states and 10483 transitions. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:33,888 INFO L93 Difference]: Finished difference Result 27488 states and 30125 transitions. [2021-12-15 09:50:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:50:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 550 [2021-12-15 09:50:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:33,922 INFO L225 Difference]: With dead ends: 27488 [2021-12-15 09:50:33,922 INFO L226 Difference]: Without dead ends: 18118 [2021-12-15 09:50:33,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:50:33,935 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 671 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:33,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 158 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:50:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18118 states. [2021-12-15 09:50:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18118 to 15418. [2021-12-15 09:50:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15418 states, 15417 states have (on average 1.096646558993319) internal successors, (16907), 15417 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states 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 09:50:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15418 states to 15418 states and 16907 transitions. [2021-12-15 09:50:34,152 INFO L78 Accepts]: Start accepts. Automaton has 15418 states and 16907 transitions. Word has length 550 [2021-12-15 09:50:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:34,153 INFO L470 AbstractCegarLoop]: Abstraction has 15418 states and 16907 transitions. [2021-12-15 09:50:34,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 15418 states and 16907 transitions. [2021-12-15 09:50:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2021-12-15 09:50:34,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:34,159 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:34,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:50:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:34,384 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2139538966, now seen corresponding path program 1 times [2021-12-15 09:50:34,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742534066] [2021-12-15 09:50:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:34,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-15 09:50:34,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742534066] [2021-12-15 09:50:34,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742534066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:34,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:34,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:34,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691521541] [2021-12-15 09:50:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:34,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:34,627 INFO L87 Difference]: Start difference. First operand 15418 states and 16907 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:35,768 INFO L93 Difference]: Finished difference Result 35613 states and 39350 transitions. [2021-12-15 09:50:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 553 [2021-12-15 09:50:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:35,798 INFO L225 Difference]: With dead ends: 35613 [2021-12-15 09:50:35,798 INFO L226 Difference]: Without dead ends: 21097 [2021-12-15 09:50:35,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:35,816 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 335 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:35,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 169 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:50:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21097 states. [2021-12-15 09:50:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21097 to 19300. [2021-12-15 09:50:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19300 states, 19299 states have (on average 1.0913000673610032) internal successors, (21061), 19299 states have internal predecessors, (21061), 0 states have call successors, (0), 0 states 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 09:50:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19300 states to 19300 states and 21061 transitions. [2021-12-15 09:50:36,114 INFO L78 Accepts]: Start accepts. Automaton has 19300 states and 21061 transitions. Word has length 553 [2021-12-15 09:50:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:36,115 INFO L470 AbstractCegarLoop]: Abstraction has 19300 states and 21061 transitions. [2021-12-15 09:50:36,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:50:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19300 states and 21061 transitions. [2021-12-15 09:50:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-12-15 09:50:36,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:36,121 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 3, 3, 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] [2021-12-15 09:50:36,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:50:36,122 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash -470802154, now seen corresponding path program 1 times [2021-12-15 09:50:36,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834480034] [2021-12-15 09:50:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:36,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-15 09:50:36,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:36,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834480034] [2021-12-15 09:50:36,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834480034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:36,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:36,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:36,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907899621] [2021-12-15 09:50:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:36,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:36,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:36,323 INFO L87 Difference]: Start difference. First operand 19300 states and 21061 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 09:50:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:37,373 INFO L93 Difference]: Finished difference Result 41288 states and 45506 transitions. [2021-12-15 09:50:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 594 [2021-12-15 09:50:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:37,396 INFO L225 Difference]: With dead ends: 41288 [2021-12-15 09:50:37,397 INFO L226 Difference]: Without dead ends: 22890 [2021-12-15 09:50:37,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 09:50:37,407 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 339 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:37,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 155 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:50:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22890 states. [2021-12-15 09:50:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22890 to 22591. [2021-12-15 09:50:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22591 states, 22590 states have (on average 1.0966799468791502) internal successors, (24774), 22590 states have internal predecessors, (24774), 0 states have call successors, (0), 0 states 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 09:50:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22591 states to 22591 states and 24774 transitions. [2021-12-15 09:50:37,646 INFO L78 Accepts]: Start accepts. Automaton has 22591 states and 24774 transitions. Word has length 594 [2021-12-15 09:50:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:37,647 INFO L470 AbstractCegarLoop]: Abstraction has 22591 states and 24774 transitions. [2021-12-15 09:50:37,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 09:50:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 22591 states and 24774 transitions. [2021-12-15 09:50:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2021-12-15 09:50:37,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:37,659 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-15 09:50:37,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:50:37,659 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash 715852150, now seen corresponding path program 1 times [2021-12-15 09:50:37,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:37,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123738941] [2021-12-15 09:50:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:37,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 573 proven. 338 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 09:50:38,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123738941] [2021-12-15 09:50:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123738941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679750730] [2021-12-15 09:50:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:38,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:38,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:38,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:50:38,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:50:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:50:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 684 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-15 09:50:39,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:50:39,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679750730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:39,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:50:39,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:50:39,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165266917] [2021-12-15 09:50:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:39,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:39,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:39,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:50:39,052 INFO L87 Difference]: Start difference. First operand 22591 states and 24774 transitions. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 09:50:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:40,060 INFO L93 Difference]: Finished difference Result 44884 states and 49250 transitions. [2021-12-15 09:50:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 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 704 [2021-12-15 09:50:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:40,084 INFO L225 Difference]: With dead ends: 44884 [2021-12-15 09:50:40,084 INFO L226 Difference]: Without dead ends: 22594 [2021-12-15 09:50:40,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:50:40,100 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 266 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:40,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 398 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:50:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22594 states. [2021-12-15 09:50:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22594 to 22586. [2021-12-15 09:50:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22586 states, 22585 states have (on average 1.0836395837945538) internal successors, (24474), 22585 states have internal predecessors, (24474), 0 states have call successors, (0), 0 states 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 09:50:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22586 states to 22586 states and 24474 transitions. [2021-12-15 09:50:40,373 INFO L78 Accepts]: Start accepts. Automaton has 22586 states and 24474 transitions. Word has length 704 [2021-12-15 09:50:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:40,374 INFO L470 AbstractCegarLoop]: Abstraction has 22586 states and 24474 transitions. [2021-12-15 09:50:40,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 09:50:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 22586 states and 24474 transitions. [2021-12-15 09:50:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2021-12-15 09:50:40,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:40,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:40,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:50:40,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 09:50:40,628 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1177133803, now seen corresponding path program 1 times [2021-12-15 09:50:40,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:40,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703408869] [2021-12-15 09:50:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:40,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 625 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-12-15 09:50:40,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:40,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703408869] [2021-12-15 09:50:40,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703408869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:40,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:40,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 09:50:40,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461968567] [2021-12-15 09:50:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:40,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:50:40,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:50:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:50:40,869 INFO L87 Difference]: Start difference. First operand 22586 states and 24474 transitions. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 09:50:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:41,915 INFO L93 Difference]: Finished difference Result 45063 states and 48837 transitions. [2021-12-15 09:50:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:50:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 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 724 [2021-12-15 09:50:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:41,938 INFO L225 Difference]: With dead ends: 45063 [2021-12-15 09:50:41,938 INFO L226 Difference]: Without dead ends: 22778 [2021-12-15 09:50:41,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:50:41,955 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 913 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:41,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 518 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:50:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22778 states. [2021-12-15 09:50:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22778 to 22586. [2021-12-15 09:50:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22586 states, 22585 states have (on average 1.0623422625636485) internal successors, (23993), 22585 states have internal predecessors, (23993), 0 states have call successors, (0), 0 states 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 09:50:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22586 states to 22586 states and 23993 transitions. [2021-12-15 09:50:42,224 INFO L78 Accepts]: Start accepts. Automaton has 22586 states and 23993 transitions. Word has length 724 [2021-12-15 09:50:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:42,224 INFO L470 AbstractCegarLoop]: Abstraction has 22586 states and 23993 transitions. [2021-12-15 09:50:42,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 09:50:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22586 states and 23993 transitions. [2021-12-15 09:50:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2021-12-15 09:50:42,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:42,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:50:42,236 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash 746757208, now seen corresponding path program 1 times [2021-12-15 09:50:42,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:42,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899049201] [2021-12-15 09:50:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:42,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-15 09:50:42,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899049201] [2021-12-15 09:50:42,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899049201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:50:42,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:50:42,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:50:42,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335213246] [2021-12-15 09:50:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:42,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:42,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:42,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:42,538 INFO L87 Difference]: Start difference. First operand 22586 states and 23993 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 09:50:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:43,468 INFO L93 Difference]: Finished difference Result 45763 states and 48664 transitions. [2021-12-15 09:50:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:43,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 726 [2021-12-15 09:50:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:43,499 INFO L225 Difference]: With dead ends: 45763 [2021-12-15 09:50:43,499 INFO L226 Difference]: Without dead ends: 24676 [2021-12-15 09:50:43,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:50:43,517 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 396 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:43,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 422 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:50:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24676 states. [2021-12-15 09:50:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24676 to 12353. [2021-12-15 09:50:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12353 states, 12352 states have (on average 1.0605569948186528) internal successors, (13100), 12352 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states 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 09:50:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12353 states to 12353 states and 13100 transitions. [2021-12-15 09:50:43,777 INFO L78 Accepts]: Start accepts. Automaton has 12353 states and 13100 transitions. Word has length 726 [2021-12-15 09:50:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:43,778 INFO L470 AbstractCegarLoop]: Abstraction has 12353 states and 13100 transitions. [2021-12-15 09:50:43,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 09:50:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 12353 states and 13100 transitions. [2021-12-15 09:50:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2021-12-15 09:50:43,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:43,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:43,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:50:43,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1664216047, now seen corresponding path program 1 times [2021-12-15 09:50:43,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:43,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435011329] [2021-12-15 09:50:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:43,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 631 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-15 09:50:44,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435011329] [2021-12-15 09:50:44,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435011329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786476533] [2021-12-15 09:50:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:44,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:44,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:44,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:50:44,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:50:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:50:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 581 proven. 76 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-15 09:50:45,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:50:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-15 09:50:47,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786476533] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:47,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:50:47,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2021-12-15 09:50:47,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311257844] [2021-12-15 09:50:47,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:50:47,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:50:47,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:50:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:50:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:50:47,857 INFO L87 Difference]: Start difference. First operand 12353 states and 13100 transitions. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 09:50:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:50:48,788 INFO L93 Difference]: Finished difference Result 27399 states and 29010 transitions. [2021-12-15 09:50:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:50:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 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 741 [2021-12-15 09:50:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:50:48,808 INFO L225 Difference]: With dead ends: 27399 [2021-12-15 09:50:48,808 INFO L226 Difference]: Without dead ends: 15347 [2021-12-15 09:50:48,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1480 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:50:48,816 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 161 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:50:48,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 83 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:50:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-12-15 09:50:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 14147. [2021-12-15 09:50:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14147 states, 14146 states have (on average 1.0560582496818889) internal successors, (14939), 14146 states have internal predecessors, (14939), 0 states have call successors, (0), 0 states 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 09:50:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14147 states to 14147 states and 14939 transitions. [2021-12-15 09:50:48,943 INFO L78 Accepts]: Start accepts. Automaton has 14147 states and 14939 transitions. Word has length 741 [2021-12-15 09:50:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:50:48,944 INFO L470 AbstractCegarLoop]: Abstraction has 14147 states and 14939 transitions. [2021-12-15 09:50:48,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 09:50:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 14147 states and 14939 transitions. [2021-12-15 09:50:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-12-15 09:50:48,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:50:48,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:48,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:50:49,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:50:49,166 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:50:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:50:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1508957717, now seen corresponding path program 1 times [2021-12-15 09:50:49,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:50:49,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355135190] [2021-12-15 09:50:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:49,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:50:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 598 proven. 106 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-15 09:50:49,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:50:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355135190] [2021-12-15 09:50:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355135190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:50:49,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215223975] [2021-12-15 09:50:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:50:49,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:50:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:50:49,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:50:49,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:50:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:50:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:50:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:50:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 598 proven. 106 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-15 09:50:51,103 INFO L328 TraceCheckSpWp]: Computing backward predicates...