./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem16_label15.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 04841d1aba9375b8a6b06dc8afee8df1fa6191c086b63f3a4a476e022f53e582 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:56:25,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:56:25,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:56:25,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:56:25,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:56:25,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:56:25,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:56:25,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:56:25,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:56:25,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:56:25,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:56:25,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:56:25,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:56:25,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:56:25,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:56:25,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:56:25,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:56:25,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:56:25,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:56:25,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:56:25,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:56:25,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:56:25,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:56:25,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:56:25,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:56:25,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:56:25,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:56:25,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:56:25,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:56:25,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:56:25,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:56:25,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:56:25,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:56:25,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:56:25,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:56:25,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:56:25,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:56:25,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:56:25,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:56:25,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:56:25,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:56:25,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:56:25,745 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:56:25,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:56:25,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:56:25,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:56:25,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:56:25,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:56:25,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:56:25,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:56:25,747 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:56:25,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:56:25,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:56:25,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:56:25,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:56:25,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:56:25,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:56:25,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:56:25,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:56:25,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:56:25,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:56:25,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:56:25,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:56:25,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:56:25,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:56:25,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:56:25,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:56:25,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:56:25,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:56:25,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:56:25,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:56:25,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:56:25,751 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:56:25,751 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:56:25,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:56:25,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:56:25,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04841d1aba9375b8a6b06dc8afee8df1fa6191c086b63f3a4a476e022f53e582 [2021-12-15 22:56:25,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:56:25,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:56:25,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:56:25,965 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:56:25,966 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:56:25,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label15.c [2021-12-15 22:56:26,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3dbff414/5205a0dcadf441d8ad1fbb1751b99f8b/FLAG55f644906 [2021-12-15 22:56:26,492 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:56:26,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label15.c [2021-12-15 22:56:26,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3dbff414/5205a0dcadf441d8ad1fbb1751b99f8b/FLAG55f644906 [2021-12-15 22:56:26,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3dbff414/5205a0dcadf441d8ad1fbb1751b99f8b [2021-12-15 22:56:26,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:56:26,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:56:26,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:56:26,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:56:26,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:56:26,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:56:26" (1/1) ... [2021-12-15 22:56:26,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467442e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:26, skipping insertion in model container [2021-12-15 22:56:26,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:56:26" (1/1) ... [2021-12-15 22:56:26,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:56:26,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:56:26,765 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/Problem16_label15.c[2501,2514] [2021-12-15 22:56:27,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:56:27,054 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:56:27,075 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/Problem16_label15.c[2501,2514] [2021-12-15 22:56:27,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:56:27,173 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:56:27,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27 WrapperNode [2021-12-15 22:56:27,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:56:27,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:56:27,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:56:27,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:56:27,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,304 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 22:56:27,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:56:27,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:56:27,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:56:27,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:56:27,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:56:27,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:56:27,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:56:27,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:56:27,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:56:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:27,457 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 22:56:27,477 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 22:56:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:56:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:56:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:56:27,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:56:27,535 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:56:27,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:56:28,739 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:56:28,753 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:56:28,753 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:56:28,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:56:28 BoogieIcfgContainer [2021-12-15 22:56:28,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:56:28,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:56:28,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:56:28,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:56:28,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:56:26" (1/3) ... [2021-12-15 22:56:28,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfad6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:56:28, skipping insertion in model container [2021-12-15 22:56:28,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27" (2/3) ... [2021-12-15 22:56:28,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfad6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:56:28, skipping insertion in model container [2021-12-15 22:56:28,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:56:28" (3/3) ... [2021-12-15 22:56:28,764 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label15.c [2021-12-15 22:56:28,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:56:28,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:56:28,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:56:28,818 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 22:56:28,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:56:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 22:56:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 22:56:28,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:28,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:28,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-12-15 22:56:28,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:28,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467309156] [2021-12-15 22:56:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:28,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:28,971 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 22:56:28,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467309156] [2021-12-15 22:56:28,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467309156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:28,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:28,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:28,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559384312] [2021-12-15 22:56:28,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:28,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:28,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:28,997 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:30,297 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-15 22:56:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:30,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 22:56:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:30,312 INFO L225 Difference]: With dead ends: 1137 [2021-12-15 22:56:30,312 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 22:56:30,315 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 22:56:30,318 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 364 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:30,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 60 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:56:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 22:56:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 22:56:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7639939485627836) internal successors, (1166), 661 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states 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 22:56:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1166 transitions. [2021-12-15 22:56:30,366 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1166 transitions. Word has length 22 [2021-12-15 22:56:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:30,366 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1166 transitions. [2021-12-15 22:56:30,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1166 transitions. [2021-12-15 22:56:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-15 22:56:30,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:30,369 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:56:30,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:56:30,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:30,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1637501072, now seen corresponding path program 1 times [2021-12-15 22:56:30,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:30,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194026759] [2021-12-15 22:56:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:30,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:30,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:30,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194026759] [2021-12-15 22:56:30,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194026759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:30,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:30,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:30,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806383558] [2021-12-15 22:56:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:30,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:30,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:30,463 INFO L87 Difference]: Start difference. First operand 662 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 22:56:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:31,571 INFO L93 Difference]: Finished difference Result 1980 states and 3493 transitions. [2021-12-15 22:56:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:31,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-15 22:56:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:31,576 INFO L225 Difference]: With dead ends: 1980 [2021-12-15 22:56:31,576 INFO L226 Difference]: Without dead ends: 1320 [2021-12-15 22:56:31,578 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 22:56:31,579 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 344 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:31,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:56:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-15 22:56:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-15 22:56:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.6656557998483699) internal successors, (2197), 1319 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states 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 22:56:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2197 transitions. [2021-12-15 22:56:31,609 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2197 transitions. Word has length 87 [2021-12-15 22:56:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:31,610 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2197 transitions. [2021-12-15 22:56:31,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 22:56:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2197 transitions. [2021-12-15 22:56:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 22:56:31,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:31,612 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:56:31,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:56:31,613 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:31,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1946453316, now seen corresponding path program 1 times [2021-12-15 22:56:31,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:31,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632331989] [2021-12-15 22:56:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:31,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:31,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632331989] [2021-12-15 22:56:31,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632331989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:31,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:31,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:31,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189372593] [2021-12-15 22:56:31,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:31,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:56:31,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:56:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:56:31,702 INFO L87 Difference]: Start difference. First operand 1320 states and 2197 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:33,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:33,371 INFO L93 Difference]: Finished difference Result 3625 states and 5926 transitions. [2021-12-15 22:56:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:56:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-15 22:56:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:33,382 INFO L225 Difference]: With dead ends: 3625 [2021-12-15 22:56:33,382 INFO L226 Difference]: Without dead ends: 2307 [2021-12-15 22:56:33,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:33,390 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1003 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:33,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 41 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 22:56:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-12-15 22:56:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2021-12-15 22:56:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.5034692107545533) internal successors, (3467), 2306 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 22:56:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3467 transitions. [2021-12-15 22:56:33,429 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3467 transitions. Word has length 90 [2021-12-15 22:56:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:33,429 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3467 transitions. [2021-12-15 22:56:33,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3467 transitions. [2021-12-15 22:56:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 22:56:33,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:33,436 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:56:33,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:56:33,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash -412895463, now seen corresponding path program 1 times [2021-12-15 22:56:33,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:33,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813257051] [2021-12-15 22:56:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:33,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 22:56:33,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813257051] [2021-12-15 22:56:33,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813257051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:33,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:33,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:33,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55470693] [2021-12-15 22:56:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:33,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:33,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:33,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:33,543 INFO L87 Difference]: Start difference. First operand 2307 states and 3467 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 22:56:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:34,584 INFO L93 Difference]: Finished difference Result 6257 states and 9726 transitions. [2021-12-15 22:56:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:34,584 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 109 [2021-12-15 22:56:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:34,595 INFO L225 Difference]: With dead ends: 6257 [2021-12-15 22:56:34,596 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 22:56:34,599 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 22:56:34,600 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 270 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:34,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 211 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:56:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 22:56:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2021-12-15 22:56:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.3539719626168225) internal successors, (5795), 4280 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states 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 22:56:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5795 transitions. [2021-12-15 22:56:34,661 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5795 transitions. Word has length 109 [2021-12-15 22:56:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:34,662 INFO L470 AbstractCegarLoop]: Abstraction has 4281 states and 5795 transitions. [2021-12-15 22:56:34,662 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 22:56:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5795 transitions. [2021-12-15 22:56:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 22:56:34,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:34,664 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:34,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:56:34,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1935014067, now seen corresponding path program 1 times [2021-12-15 22:56:34,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:34,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818035116] [2021-12-15 22:56:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:34,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:34,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:34,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818035116] [2021-12-15 22:56:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818035116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:34,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501895464] [2021-12-15 22:56:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:34,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:34,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:34,784 INFO L87 Difference]: Start difference. First operand 4281 states and 5795 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 22:56:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:35,672 INFO L93 Difference]: Finished difference Result 9547 states and 12996 transitions. [2021-12-15 22:56:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2021-12-15 22:56:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:35,689 INFO L225 Difference]: With dead ends: 9547 [2021-12-15 22:56:35,689 INFO L226 Difference]: Without dead ends: 5597 [2021-12-15 22:56:35,694 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 22:56:35,697 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 281 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:35,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 545 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:56:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-12-15 22:56:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5597. [2021-12-15 22:56:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 1.2977126518942101) internal successors, (7262), 5596 states have internal predecessors, (7262), 0 states have call successors, (0), 0 states 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 22:56:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 7262 transitions. [2021-12-15 22:56:35,808 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 7262 transitions. Word has length 205 [2021-12-15 22:56:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:35,809 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 7262 transitions. [2021-12-15 22:56:35,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 22:56:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 7262 transitions. [2021-12-15 22:56:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-15 22:56:35,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:35,812 INFO L514 BasicCegarLoop]: trace histogram [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, 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 22:56:35,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:56:35,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2143636990, now seen corresponding path program 1 times [2021-12-15 22:56:35,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:35,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559389015] [2021-12-15 22:56:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:35,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-15 22:56:35,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:35,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559389015] [2021-12-15 22:56:35,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559389015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:35,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:35,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:35,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698343380] [2021-12-15 22:56:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:35,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:35,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:35,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:35,878 INFO L87 Difference]: Start difference. First operand 5597 states and 7262 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 22:56:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:36,792 INFO L93 Difference]: Finished difference Result 14153 states and 18440 transitions. [2021-12-15 22:56:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 289 [2021-12-15 22:56:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:36,815 INFO L225 Difference]: With dead ends: 14153 [2021-12-15 22:56:36,815 INFO L226 Difference]: Without dead ends: 7900 [2021-12-15 22:56:36,822 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 22:56:36,822 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:36,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:56:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2021-12-15 22:56:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 6913. [2021-12-15 22:56:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6913 states, 6912 states have (on average 1.0727719907407407) internal successors, (7415), 6912 states have internal predecessors, (7415), 0 states have call successors, (0), 0 states 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 22:56:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7415 transitions. [2021-12-15 22:56:36,979 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7415 transitions. Word has length 289 [2021-12-15 22:56:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:36,980 INFO L470 AbstractCegarLoop]: Abstraction has 6913 states and 7415 transitions. [2021-12-15 22:56:36,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 22:56:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7415 transitions. [2021-12-15 22:56:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-15 22:56:36,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:36,984 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:36,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:56:36,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1666899035, now seen corresponding path program 1 times [2021-12-15 22:56:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:36,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319758080] [2021-12-15 22:56:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:36,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 22:56:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319758080] [2021-12-15 22:56:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319758080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:37,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:37,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:37,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411605320] [2021-12-15 22:56:37,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:37,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:37,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:37,115 INFO L87 Difference]: Start difference. First operand 6913 states and 7415 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 22:56:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:37,973 INFO L93 Difference]: Finished difference Result 16785 states and 18059 transitions. [2021-12-15 22:56:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 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 353 [2021-12-15 22:56:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:38,005 INFO L225 Difference]: With dead ends: 16785 [2021-12-15 22:56:38,005 INFO L226 Difference]: Without dead ends: 10203 [2021-12-15 22:56:38,009 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 22:56:38,011 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:38,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 45 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:56:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-12-15 22:56:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9874. [2021-12-15 22:56:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9874 states, 9873 states have (on average 1.0731287349336573) internal successors, (10595), 9873 states have internal predecessors, (10595), 0 states have call successors, (0), 0 states 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 22:56:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 10595 transitions. [2021-12-15 22:56:38,128 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 10595 transitions. Word has length 353 [2021-12-15 22:56:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:38,129 INFO L470 AbstractCegarLoop]: Abstraction has 9874 states and 10595 transitions. [2021-12-15 22:56:38,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 22:56:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 10595 transitions. [2021-12-15 22:56:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-15 22:56:38,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:38,133 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:38,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:56:38,133 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1478604103, now seen corresponding path program 1 times [2021-12-15 22:56:38,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:38,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993675234] [2021-12-15 22:56:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:38,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 22:56:38,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993675234] [2021-12-15 22:56:38,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993675234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:38,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:38,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:38,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76746431] [2021-12-15 22:56:38,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:38,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:38,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:38,232 INFO L87 Difference]: Start difference. First operand 9874 states and 10595 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 22:56:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:38,985 INFO L93 Difference]: Finished difference Result 23036 states and 24793 transitions. [2021-12-15 22:56:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 22:56:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:39,003 INFO L225 Difference]: With dead ends: 23036 [2021-12-15 22:56:39,004 INFO L226 Difference]: Without dead ends: 13493 [2021-12-15 22:56:39,009 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 22:56:39,010 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 327 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:39,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 40 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-15 22:56:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 11848. [2021-12-15 22:56:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0697222925635181) internal successors, (12673), 11847 states have internal predecessors, (12673), 0 states have call successors, (0), 0 states 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 22:56:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12673 transitions. [2021-12-15 22:56:39,134 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12673 transitions. Word has length 361 [2021-12-15 22:56:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:39,135 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12673 transitions. [2021-12-15 22:56:39,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 22:56:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12673 transitions. [2021-12-15 22:56:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-12-15 22:56:39,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:39,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:39,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:56:39,141 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1643051424, now seen corresponding path program 1 times [2021-12-15 22:56:39,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:39,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822475674] [2021-12-15 22:56:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:39,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 22:56:39,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822475674] [2021-12-15 22:56:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822475674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885088327] [2021-12-15 22:56:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:39,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:39,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:39,283 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 22:56:39,284 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 22:56:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:56:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-15 22:56:40,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885088327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:40,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:40,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:56:40,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186267338] [2021-12-15 22:56:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:40,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:40,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:40,149 INFO L87 Difference]: Start difference. First operand 11848 states and 12673 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 22:56:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:40,796 INFO L93 Difference]: Finished difference Result 13495 states and 14368 transitions. [2021-12-15 22:56:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:40,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 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 415 [2021-12-15 22:56:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:40,815 INFO L225 Difference]: With dead ends: 13495 [2021-12-15 22:56:40,816 INFO L226 Difference]: Without dead ends: 13493 [2021-12-15 22:56:40,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:40,820 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 116 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:40,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 76 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:56:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-15 22:56:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 12177. [2021-12-15 22:56:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.06857752956636) internal successors, (13011), 12176 states have internal predecessors, (13011), 0 states have call successors, (0), 0 states 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 22:56:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 13011 transitions. [2021-12-15 22:56:40,985 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 13011 transitions. Word has length 415 [2021-12-15 22:56:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:40,985 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 13011 transitions. [2021-12-15 22:56:40,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 22:56:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 13011 transitions. [2021-12-15 22:56:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2021-12-15 22:56:41,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:41,003 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:56:41,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:56:41,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:41,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1582476169, now seen corresponding path program 1 times [2021-12-15 22:56:41,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592106829] [2021-12-15 22:56:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:41,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 664 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-12-15 22:56:41,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592106829] [2021-12-15 22:56:41,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592106829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:41,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:41,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:41,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455765258] [2021-12-15 22:56:41,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:41,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:41,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:41,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:41,422 INFO L87 Difference]: Start difference. First operand 12177 states and 13011 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 2 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 22:56:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:42,044 INFO L93 Difference]: Finished difference Result 24352 states and 26026 transitions. [2021-12-15 22:56:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 2 states have internal predecessors, (390), 0 states have call successors, (0), 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 816 [2021-12-15 22:56:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:42,060 INFO L225 Difference]: With dead ends: 24352 [2021-12-15 22:56:42,103 INFO L226 Difference]: Without dead ends: 12506 [2021-12-15 22:56:42,111 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 22:56:42,111 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 85 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 103 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:56:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-12-15 22:56:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12506. [2021-12-15 22:56:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0673330667732908) internal successors, (13347), 12505 states have internal predecessors, (13347), 0 states have call successors, (0), 0 states 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 22:56:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 13347 transitions. [2021-12-15 22:56:42,287 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 13347 transitions. Word has length 816 [2021-12-15 22:56:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:42,288 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 13347 transitions. [2021-12-15 22:56:42,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 2 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 22:56:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 13347 transitions. [2021-12-15 22:56:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2021-12-15 22:56:42,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:42,306 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:42,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:56:42,306 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash -199557859, now seen corresponding path program 1 times [2021-12-15 22:56:42,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863042110] [2021-12-15 22:56:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:42,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 816 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-15 22:56:42,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863042110] [2021-12-15 22:56:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863042110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:42,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:42,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357069784] [2021-12-15 22:56:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:42,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:42,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:42,485 INFO L87 Difference]: Start difference. First operand 12506 states and 13347 transitions. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 22:56:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:43,208 INFO L93 Difference]: Finished difference Result 26984 states and 28880 transitions. [2021-12-15 22:56:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 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 824 [2021-12-15 22:56:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:43,223 INFO L225 Difference]: With dead ends: 26984 [2021-12-15 22:56:43,224 INFO L226 Difference]: Without dead ends: 15138 [2021-12-15 22:56:43,234 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 22:56:43,234 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:43,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 434 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2021-12-15 22:56:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 14480. [2021-12-15 22:56:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0551833690171972) internal successors, (15278), 14479 states have internal predecessors, (15278), 0 states have call successors, (0), 0 states 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 22:56:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 15278 transitions. [2021-12-15 22:56:43,364 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 15278 transitions. Word has length 824 [2021-12-15 22:56:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:43,364 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 15278 transitions. [2021-12-15 22:56:43,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 22:56:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 15278 transitions. [2021-12-15 22:56:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2021-12-15 22:56:43,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:43,379 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:56:43,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:56:43,380 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1171742028, now seen corresponding path program 1 times [2021-12-15 22:56:43,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:43,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535340496] [2021-12-15 22:56:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:43,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1024 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-15 22:56:43,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:43,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535340496] [2021-12-15 22:56:43,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535340496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:43,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:43,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:43,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375831625] [2021-12-15 22:56:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:43,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:43,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:43,626 INFO L87 Difference]: Start difference. First operand 14480 states and 15278 transitions. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 22:56:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:44,312 INFO L93 Difference]: Finished difference Result 30603 states and 32325 transitions. [2021-12-15 22:56:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:44,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 950 [2021-12-15 22:56:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:44,329 INFO L225 Difference]: With dead ends: 30603 [2021-12-15 22:56:44,330 INFO L226 Difference]: Without dead ends: 16783 [2021-12-15 22:56:44,342 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 22:56:44,343 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 251 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:44,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 428 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:56:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-12-15 22:56:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 16783. [2021-12-15 22:56:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16783 states, 16782 states have (on average 1.0493981647002741) internal successors, (17611), 16782 states have internal predecessors, (17611), 0 states have call successors, (0), 0 states 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 22:56:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16783 states to 16783 states and 17611 transitions. [2021-12-15 22:56:44,549 INFO L78 Accepts]: Start accepts. Automaton has 16783 states and 17611 transitions. Word has length 950 [2021-12-15 22:56:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 16783 states and 17611 transitions. [2021-12-15 22:56:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 22:56:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16783 states and 17611 transitions. [2021-12-15 22:56:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2021-12-15 22:56:44,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:44,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:44,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:56:44,570 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1485145291, now seen corresponding path program 1 times [2021-12-15 22:56:44,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:44,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471894925] [2021-12-15 22:56:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:44,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 566 proven. 712 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-12-15 22:56:44,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471894925] [2021-12-15 22:56:44,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471894925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474633216] [2021-12-15 22:56:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:44,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:44,876 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 22:56:44,877 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 22:56:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:45,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:56:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 846 proven. 0 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2021-12-15 22:56:46,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:46,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474633216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:46,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:46,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 22:56:46,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708200791] [2021-12-15 22:56:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:46,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:46,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:46,120 INFO L87 Difference]: Start difference. First operand 16783 states and 17611 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 22:56:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:46,754 INFO L93 Difference]: Finished difference Result 32906 states and 34553 transitions. [2021-12-15 22:56:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 964 [2021-12-15 22:56:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:46,770 INFO L225 Difference]: With dead ends: 32906 [2021-12-15 22:56:46,770 INFO L226 Difference]: Without dead ends: 16783 [2021-12-15 22:56:46,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 964 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 22:56:46,780 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 179 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:46,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 377 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:56:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-12-15 22:56:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 16454. [2021-12-15 22:56:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16454 states, 16453 states have (on average 1.0423630948763143) internal successors, (17150), 16453 states have internal predecessors, (17150), 0 states have call successors, (0), 0 states 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 22:56:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16454 states to 16454 states and 17150 transitions. [2021-12-15 22:56:46,987 INFO L78 Accepts]: Start accepts. Automaton has 16454 states and 17150 transitions. Word has length 964 [2021-12-15 22:56:46,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:46,987 INFO L470 AbstractCegarLoop]: Abstraction has 16454 states and 17150 transitions. [2021-12-15 22:56:46,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 22:56:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 16454 states and 17150 transitions. [2021-12-15 22:56:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1538 [2021-12-15 22:56:47,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:47,016 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:56:47,034 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 22:56:47,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 22:56:47,234 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1826651795, now seen corresponding path program 1 times [2021-12-15 22:56:47,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:47,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095717666] [2021-12-15 22:56:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:47,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 2951 proven. 0 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-12-15 22:56:47,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:47,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095717666] [2021-12-15 22:56:47,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095717666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:47,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:47,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:56:47,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588855890] [2021-12-15 22:56:47,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:47,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:56:47,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:56:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:56:47,788 INFO L87 Difference]: Start difference. First operand 16454 states and 17150 transitions. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 22:56:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:48,725 INFO L93 Difference]: Finished difference Result 32279 states and 33662 transitions. [2021-12-15 22:56:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:56:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 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 1537 [2021-12-15 22:56:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:48,742 INFO L225 Difference]: With dead ends: 32279 [2021-12-15 22:56:48,743 INFO L226 Difference]: Without dead ends: 16485 [2021-12-15 22:56:48,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:48,775 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 265 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:48,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 449 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:56:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16485 states. [2021-12-15 22:56:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16485 to 16125. [2021-12-15 22:56:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.0425452741255272) internal successors, (16810), 16124 states have internal predecessors, (16810), 0 states have call successors, (0), 0 states 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 22:56:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16810 transitions. [2021-12-15 22:56:48,915 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16810 transitions. Word has length 1537 [2021-12-15 22:56:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16810 transitions. [2021-12-15 22:56:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 22:56:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16810 transitions. [2021-12-15 22:56:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1553 [2021-12-15 22:56:48,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:48,949 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 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] [2021-12-15 22:56:48,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:56:48,950 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:48,950 INFO L85 PathProgramCache]: Analyzing trace with hash 582415043, now seen corresponding path program 1 times [2021-12-15 22:56:48,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:48,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308475117] [2021-12-15 22:56:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:48,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 2854 proven. 0 refuted. 0 times theorem prover too weak. 1493 trivial. 0 not checked. [2021-12-15 22:56:49,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:49,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308475117] [2021-12-15 22:56:49,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308475117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:49,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:49,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:49,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100303956] [2021-12-15 22:56:49,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:49,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:49,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:49,405 INFO L87 Difference]: Start difference. First operand 16125 states and 16810 transitions. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 22:56:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:50,140 INFO L93 Difference]: Finished difference Result 31590 states and 32951 transitions. [2021-12-15 22:56:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 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 1552 [2021-12-15 22:56:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:50,156 INFO L225 Difference]: With dead ends: 31590 [2021-12-15 22:56:50,157 INFO L226 Difference]: Without dead ends: 16125 [2021-12-15 22:56:50,167 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 22:56:50,167 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 196 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:50,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 422 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2021-12-15 22:56:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 15796. [2021-12-15 22:56:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.034821145932257) internal successors, (16345), 15795 states have internal predecessors, (16345), 0 states have call successors, (0), 0 states 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 22:56:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16345 transitions. [2021-12-15 22:56:50,370 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16345 transitions. Word has length 1552 [2021-12-15 22:56:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:50,371 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16345 transitions. [2021-12-15 22:56:50,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states 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 22:56:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16345 transitions. [2021-12-15 22:56:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2021-12-15 22:56:50,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:50,402 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 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] [2021-12-15 22:56:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:56:50,403 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -730870637, now seen corresponding path program 1 times [2021-12-15 22:56:50,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:50,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028128821] [2021-12-15 22:56:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:50,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 3196 proven. 0 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-12-15 22:56:50,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:50,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028128821] [2021-12-15 22:56:50,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028128821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:50,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:50,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:56:50,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45483209] [2021-12-15 22:56:50,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:50,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:56:50,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:56:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:56:50,890 INFO L87 Difference]: Start difference. First operand 15796 states and 16345 transitions. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 22:56:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:51,745 INFO L93 Difference]: Finished difference Result 31049 states and 32138 transitions. [2021-12-15 22:56:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:56:51,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 1577 [2021-12-15 22:56:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:51,759 INFO L225 Difference]: With dead ends: 31049 [2021-12-15 22:56:51,760 INFO L226 Difference]: Without dead ends: 15913 [2021-12-15 22:56:51,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:51,770 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 168 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:51,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 567 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:56:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2021-12-15 22:56:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 15796. [2021-12-15 22:56:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.0340614118391895) internal successors, (16333), 15795 states have internal predecessors, (16333), 0 states have call successors, (0), 0 states 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 22:56:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16333 transitions. [2021-12-15 22:56:51,915 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16333 transitions. Word has length 1577 [2021-12-15 22:56:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:51,916 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16333 transitions. [2021-12-15 22:56:51,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 22:56:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16333 transitions. [2021-12-15 22:56:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2021-12-15 22:56:51,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:51,976 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-15 22:56:51,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:56:51,977 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1410338547, now seen corresponding path program 1 times [2021-12-15 22:56:51,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:51,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943417817] [2021-12-15 22:56:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:51,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4813 backedges. 3010 proven. 1028 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-12-15 22:56:52,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943417817] [2021-12-15 22:56:52,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943417817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726908418] [2021-12-15 22:56:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:52,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:52,580 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 22:56:52,580 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 22:56:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:56:52,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4813 backedges. 2261 proven. 0 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2021-12-15 22:56:55,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:55,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726908418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:55,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:55,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-15 22:56:55,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113006064] [2021-12-15 22:56:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:55,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:55,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:56:55,701 INFO L87 Difference]: Start difference. First operand 15796 states and 16333 transitions. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 2 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 22:56:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:56,417 INFO L93 Difference]: Finished difference Result 30932 states and 31997 transitions. [2021-12-15 22:56:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 2 states have internal predecessors, (524), 0 states have call successors, (0), 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 1669 [2021-12-15 22:56:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:56,428 INFO L225 Difference]: With dead ends: 30932 [2021-12-15 22:56:56,428 INFO L226 Difference]: Without dead ends: 15796 [2021-12-15 22:56:56,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1671 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:56:56,432 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 86 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:56,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:56:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-15 22:56:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15796. [2021-12-15 22:56:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.0339981006647674) internal successors, (16332), 15795 states have internal predecessors, (16332), 0 states have call successors, (0), 0 states 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 22:56:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16332 transitions. [2021-12-15 22:56:56,582 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16332 transitions. Word has length 1669 [2021-12-15 22:56:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:56,582 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16332 transitions. [2021-12-15 22:56:56,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 2 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 22:56:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16332 transitions. [2021-12-15 22:56:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2021-12-15 22:56:56,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:56,614 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:56:56,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 22:56:56,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:56,814 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:56,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1894392430, now seen corresponding path program 1 times [2021-12-15 22:56:56,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:56,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60946838] [2021-12-15 22:56:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:56,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5399 backedges. 2223 proven. 156 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2021-12-15 22:56:57,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:57,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60946838] [2021-12-15 22:56:57,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60946838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:57,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417842918] [2021-12-15 22:56:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:57,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:57,465 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 22:56:57,466 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 22:56:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:56:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5399 backedges. 2379 proven. 0 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2021-12-15 22:57:00,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:00,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417842918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:00,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:00,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:57:00,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135836817] [2021-12-15 22:57:00,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:00,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:00,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:00,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:00,049 INFO L87 Difference]: Start difference. First operand 15796 states and 16332 transitions. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 22:57:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:01,010 INFO L93 Difference]: Finished difference Result 33235 states and 34391 transitions. [2021-12-15 22:57:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 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 1699 [2021-12-15 22:57:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:01,026 INFO L225 Difference]: With dead ends: 33235 [2021-12-15 22:57:01,026 INFO L226 Difference]: Without dead ends: 18099 [2021-12-15 22:57:01,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1698 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:01,036 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:01,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 101 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:57:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-12-15 22:57:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 15796. [2021-12-15 22:57:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.0305159860715416) internal successors, (16277), 15795 states have internal predecessors, (16277), 0 states have call successors, (0), 0 states 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 22:57:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16277 transitions. [2021-12-15 22:57:01,173 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16277 transitions. Word has length 1699 [2021-12-15 22:57:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:01,174 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16277 transitions. [2021-12-15 22:57:01,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 22:57:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16277 transitions. [2021-12-15 22:57:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1869 [2021-12-15 22:57:01,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:01,202 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2021-12-15 22:57:01,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 22:57:01,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 22:57:01,407 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1582827338, now seen corresponding path program 1 times [2021-12-15 22:57:01,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:01,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107770510] [2021-12-15 22:57:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:01,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6594 backedges. 4178 proven. 1114 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-12-15 22:57:02,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:02,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107770510] [2021-12-15 22:57:02,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107770510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:02,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191223519] [2021-12-15 22:57:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:02,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:02,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:02,036 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 22:57:02,037 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 22:57:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:57:02,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6594 backedges. 4413 proven. 0 refuted. 0 times theorem prover too weak. 2181 trivial. 0 not checked. [2021-12-15 22:57:04,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:04,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191223519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:04,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 22:57:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984633499] [2021-12-15 22:57:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:04,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:04,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:57:04,335 INFO L87 Difference]: Start difference. First operand 15796 states and 16277 transitions. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 22:57:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:05,172 INFO L93 Difference]: Finished difference Result 31590 states and 32552 transitions. [2021-12-15 22:57:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 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 1868 [2021-12-15 22:57:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:05,185 INFO L225 Difference]: With dead ends: 31590 [2021-12-15 22:57:05,185 INFO L226 Difference]: Without dead ends: 15796 [2021-12-15 22:57:05,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1876 GetRequests, 1872 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:57:05,194 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 65 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:05,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 417 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:57:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-15 22:57:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15796. [2021-12-15 22:57:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.0219056663501107) internal successors, (16141), 15795 states have internal predecessors, (16141), 0 states have call successors, (0), 0 states 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 22:57:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16141 transitions. [2021-12-15 22:57:05,333 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16141 transitions. Word has length 1868 [2021-12-15 22:57:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:05,333 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 16141 transitions. [2021-12-15 22:57:05,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 22:57:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16141 transitions. [2021-12-15 22:57:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1952 [2021-12-15 22:57:05,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:05,369 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2021-12-15 22:57:05,389 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 22:57:05,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:05,586 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash -317944328, now seen corresponding path program 1 times [2021-12-15 22:57:05,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:05,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075117180] [2021-12-15 22:57:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:05,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7299 backedges. 3697 proven. 1033 refuted. 0 times theorem prover too weak. 2569 trivial. 0 not checked. [2021-12-15 22:57:06,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075117180] [2021-12-15 22:57:06,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075117180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944542571] [2021-12-15 22:57:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:06,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:06,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:06,345 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 22:57:06,346 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 22:57:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:06,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:57:06,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7299 backedges. 3948 proven. 0 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2021-12-15 22:57:08,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:08,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944542571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:08,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:08,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 22:57:08,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066786614] [2021-12-15 22:57:08,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:08,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:08,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-15 22:57:08,703 INFO L87 Difference]: Start difference. First operand 15796 states and 16141 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 22:57:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:09,354 INFO L93 Difference]: Finished difference Result 31919 states and 32614 transitions. [2021-12-15 22:57:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 1951 [2021-12-15 22:57:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:09,367 INFO L225 Difference]: With dead ends: 31919 [2021-12-15 22:57:09,367 INFO L226 Difference]: Without dead ends: 16125 [2021-12-15 22:57:09,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1959 GetRequests, 1952 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-15 22:57:09,377 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:09,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 433 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:57:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2021-12-15 22:57:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 16125. [2021-12-15 22:57:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.021086579012652) internal successors, (16464), 16124 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states 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 22:57:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16464 transitions. [2021-12-15 22:57:09,522 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16464 transitions. Word has length 1951 [2021-12-15 22:57:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:09,523 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16464 transitions. [2021-12-15 22:57:09,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 22:57:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16464 transitions. [2021-12-15 22:57:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2036 [2021-12-15 22:57:09,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:09,559 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2021-12-15 22:57:09,576 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 22:57:09,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:09,760 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash 510325919, now seen corresponding path program 1 times [2021-12-15 22:57:09,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:09,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135929120] [2021-12-15 22:57:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:09,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8423 backedges. 6056 proven. 140 refuted. 0 times theorem prover too weak. 2227 trivial. 0 not checked. [2021-12-15 22:57:10,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:10,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135929120] [2021-12-15 22:57:10,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135929120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027232261] [2021-12-15 22:57:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:10,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:10,424 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 22:57:10,425 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 22:57:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:57:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8423 backedges. 4828 proven. 0 refuted. 0 times theorem prover too weak. 3595 trivial. 0 not checked. [2021-12-15 22:57:13,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:13,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027232261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:13,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:13,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 22:57:13,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216934573] [2021-12-15 22:57:13,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:13,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:13,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:13,128 INFO L87 Difference]: Start difference. First operand 16125 states and 16464 transitions. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 22:57:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:14,061 INFO L93 Difference]: Finished difference Result 35867 states and 36617 transitions. [2021-12-15 22:57:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 2035 [2021-12-15 22:57:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:14,077 INFO L225 Difference]: With dead ends: 35867 [2021-12-15 22:57:14,077 INFO L226 Difference]: Without dead ends: 19744 [2021-12-15 22:57:14,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2040 GetRequests, 2035 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:14,087 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:14,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 431 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:57:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-12-15 22:57:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 18428. [2021-12-15 22:57:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 1.0200249633689695) internal successors, (18796), 18427 states have internal predecessors, (18796), 0 states have call successors, (0), 0 states 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 22:57:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 18796 transitions. [2021-12-15 22:57:14,233 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 18796 transitions. Word has length 2035 [2021-12-15 22:57:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:14,233 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 18796 transitions. [2021-12-15 22:57:14,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 22:57:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 18796 transitions. [2021-12-15 22:57:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2067 [2021-12-15 22:57:14,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:14,265 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2021-12-15 22:57:14,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 22:57:14,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:14,484 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash 190079952, now seen corresponding path program 1 times [2021-12-15 22:57:14,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144430492] [2021-12-15 22:57:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:14,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8846 backedges. 6551 proven. 78 refuted. 0 times theorem prover too weak. 2217 trivial. 0 not checked. [2021-12-15 22:57:15,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:15,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144430492] [2021-12-15 22:57:15,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144430492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:15,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321149580] [2021-12-15 22:57:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:15,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:15,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:15,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:57:15,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 22:57:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2412 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:57:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates...