./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.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 faa92f3a348dfbe60d7663031fcd6f715676a2874c7581f2c55a3b15e2409056 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:09:07,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:09:07,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:09:07,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:09:07,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:09:07,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:09:07,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:09:07,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:09:07,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:09:07,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:09:07,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:09:07,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:09:07,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:09:07,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:09:07,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:09:07,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:09:07,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:09:07,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:09:07,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:09:07,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:09:07,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:09:07,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:09:07,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:09:07,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:09:07,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:09:07,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:09:07,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:09:07,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:09:07,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:09:07,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:09:07,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:09:07,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:09:07,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:09:07,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:09:07,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:09:07,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:09:07,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:09:07,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:09:07,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:09:07,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:09:07,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:09:07,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:09:07,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:09:07,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:09:07,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:09:07,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:09:07,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:09:07,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:09:07,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:09:07,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:09:07,970 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:09:07,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:09:07,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:09:07,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:09:07,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:09:07,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:09:07,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:09:07,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:09:07,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:09:07,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:09:07,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:09:07,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:09:07,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:09:07,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:09:07,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faa92f3a348dfbe60d7663031fcd6f715676a2874c7581f2c55a3b15e2409056 [2021-12-15 12:09:08,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:09:08,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:09:08,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:09:08,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:09:08,245 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:09:08,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-15 12:09:08,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084835394/28b02be33e094687a15eb0a1c7c50669/FLAG47fa76f56 [2021-12-15 12:09:08,843 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:09:08,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-15 12:09:08,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084835394/28b02be33e094687a15eb0a1c7c50669/FLAG47fa76f56 [2021-12-15 12:09:09,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084835394/28b02be33e094687a15eb0a1c7c50669 [2021-12-15 12:09:09,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:09:09,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:09:09,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:09:09,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:09:09,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:09:09,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:09:09" (1/1) ... [2021-12-15 12:09:09,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e246d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:09, skipping insertion in model container [2021-12-15 12:09:09,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:09:09" (1/1) ... [2021-12-15 12:09:09,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:09:09,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:09:09,769 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[15510,15523] [2021-12-15 12:09:09,833 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[23258,23271] [2021-12-15 12:09:10,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:09:10,380 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:09:10,429 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[15510,15523] [2021-12-15 12:09:10,442 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[23258,23271] [2021-12-15 12:09:10,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:09:10,767 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:09:10,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10 WrapperNode [2021-12-15 12:09:10,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:09:10,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:09:10,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:09:10,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:09:10,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:10,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,033 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5147 [2021-12-15 12:09:11,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:09:11,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:09:11,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:09:11,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:09:11,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:09:11,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:09:11,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:09:11,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:09:11,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (1/1) ... [2021-12-15 12:09:11,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:09:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:09:11,533 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 12:09:11,540 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 12:09:11,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:09:11,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:09:11,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:09:11,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:09:11,684 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:09:11,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:09:14,238 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:09:14,253 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:09:14,254 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:09:14,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:09:14 BoogieIcfgContainer [2021-12-15 12:09:14,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:09:14,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:09:14,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:09:14,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:09:14,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:09:09" (1/3) ... [2021-12-15 12:09:14,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b4b04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:09:14, skipping insertion in model container [2021-12-15 12:09:14,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:09:10" (2/3) ... [2021-12-15 12:09:14,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b4b04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:09:14, skipping insertion in model container [2021-12-15 12:09:14,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:09:14" (3/3) ... [2021-12-15 12:09:14,266 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-15 12:09:14,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:09:14,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:09:14,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:09:14,322 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 12:09:14,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:09:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states 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 12:09:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 12:09:14,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:14,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:14,361 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash -321533933, now seen corresponding path program 1 times [2021-12-15 12:09:14,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:14,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465378445] [2021-12-15 12:09:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:14,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:14,538 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 12:09:14,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:14,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465378445] [2021-12-15 12:09:14,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465378445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:14,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:14,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:09:14,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090780118] [2021-12-15 12:09:14,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:14,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 12:09:14,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 12:09:14,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:09:14,583 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 12:09:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:14,669 INFO L93 Difference]: Finished difference Result 1808 states and 3422 transitions. [2021-12-15 12:09:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 12:09:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 12:09:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:14,694 INFO L225 Difference]: With dead ends: 1808 [2021-12-15 12:09:14,694 INFO L226 Difference]: Without dead ends: 862 [2021-12-15 12:09:14,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:09:14,707 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:14,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-15 12:09:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-15 12:09:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 861 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 12:09:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1623 transitions. [2021-12-15 12:09:14,801 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1623 transitions. Word has length 38 [2021-12-15 12:09:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:14,802 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1623 transitions. [2021-12-15 12:09:14,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 12:09:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1623 transitions. [2021-12-15 12:09:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 12:09:14,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:14,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:14,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:09:14,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-12-15 12:09:14,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:14,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591262378] [2021-12-15 12:09:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:14,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:14,938 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 12:09:14,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591262378] [2021-12-15 12:09:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591262378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:14,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:14,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:09:14,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921946971] [2021-12-15 12:09:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:14,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:09:14,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:09:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:09:14,943 INFO L87 Difference]: Start difference. First operand 862 states and 1623 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 12:09:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:15,024 INFO L93 Difference]: Finished difference Result 928 states and 1725 transitions. [2021-12-15 12:09:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:09:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 12:09:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:15,028 INFO L225 Difference]: With dead ends: 928 [2021-12-15 12:09:15,029 INFO L226 Difference]: Without dead ends: 862 [2021-12-15 12:09:15,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:09:15,031 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:15,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-15 12:09:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-15 12:09:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.8406976744186045) internal successors, (1583), 861 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states 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 12:09:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1583 transitions. [2021-12-15 12:09:15,049 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1583 transitions. Word has length 38 [2021-12-15 12:09:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:15,050 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1583 transitions. [2021-12-15 12:09:15,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 12:09:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1583 transitions. [2021-12-15 12:09:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:09:15,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:15,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:15,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:09:15,053 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1060707035, now seen corresponding path program 1 times [2021-12-15 12:09:15,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879856945] [2021-12-15 12:09:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:15,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:15,123 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 12:09:15,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:15,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879856945] [2021-12-15 12:09:15,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879856945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:15,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:15,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:09:15,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328090896] [2021-12-15 12:09:15,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:15,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:15,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:15,126 INFO L87 Difference]: Start difference. First operand 862 states and 1583 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:09:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,192 INFO L93 Difference]: Finished difference Result 2366 states and 4456 transitions. [2021-12-15 12:09:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 12:09:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,198 INFO L225 Difference]: With dead ends: 2366 [2021-12-15 12:09:18,198 INFO L226 Difference]: Without dead ends: 1613 [2021-12-15 12:09:18,199 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 12:09:18,200 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 878 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 619 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 12:09:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-15 12:09:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-15 12:09:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.590316573556797) internal successors, (2562), 1612 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 12:09:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2562 transitions. [2021-12-15 12:09:18,226 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2562 transitions. Word has length 67 [2021-12-15 12:09:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:18,227 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2562 transitions. [2021-12-15 12:09:18,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:09:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2562 transitions. [2021-12-15 12:09:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:09:18,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:18,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:18,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:09:18,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-12-15 12:09:18,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:18,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296245637] [2021-12-15 12:09:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:18,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:18,317 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 12:09:18,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296245637] [2021-12-15 12:09:18,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296245637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:18,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:18,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:18,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152236563] [2021-12-15 12:09:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:18,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:18,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:18,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:18,320 INFO L87 Difference]: Start difference. First operand 1613 states and 2562 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,342 INFO L93 Difference]: Finished difference Result 1731 states and 2748 transitions. [2021-12-15 12:09:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:18,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:09:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,347 INFO L225 Difference]: With dead ends: 1731 [2021-12-15 12:09:18,347 INFO L226 Difference]: Without dead ends: 1669 [2021-12-15 12:09:18,348 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 12:09:18,348 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-12-15 12:09:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2021-12-15 12:09:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.5903903903903904) internal successors, (2648), 1666 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states 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 12:09:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2648 transitions. [2021-12-15 12:09:18,374 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2648 transitions. Word has length 77 [2021-12-15 12:09:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:18,374 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2648 transitions. [2021-12-15 12:09:18,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2648 transitions. [2021-12-15 12:09:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:09:18,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:18,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:09:18,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-12-15 12:09:18,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817766055] [2021-12-15 12:09:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:18,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:18,433 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 12:09:18,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817766055] [2021-12-15 12:09:18,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817766055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:18,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:18,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:18,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686029936] [2021-12-15 12:09:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:18,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:18,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:18,439 INFO L87 Difference]: Start difference. First operand 1667 states and 2648 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,469 INFO L93 Difference]: Finished difference Result 1887 states and 2996 transitions. [2021-12-15 12:09:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:09:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,475 INFO L225 Difference]: With dead ends: 1887 [2021-12-15 12:09:18,475 INFO L226 Difference]: Without dead ends: 1771 [2021-12-15 12:09:18,475 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 12:09:18,478 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-15 12:09:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2021-12-15 12:09:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.5897000565930957) internal successors, (2809), 1768 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states 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 12:09:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2809 transitions. [2021-12-15 12:09:18,534 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2809 transitions. Word has length 77 [2021-12-15 12:09:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:18,534 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2809 transitions. [2021-12-15 12:09:18,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2809 transitions. [2021-12-15 12:09:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:09:18,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:18,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:18,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:09:18,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-12-15 12:09:18,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:18,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693843889] [2021-12-15 12:09:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:18,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:18,582 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 12:09:18,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:18,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693843889] [2021-12-15 12:09:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693843889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:18,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:18,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:18,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567471242] [2021-12-15 12:09:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:18,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:18,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:18,585 INFO L87 Difference]: Start difference. First operand 1769 states and 2809 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,617 INFO L93 Difference]: Finished difference Result 2181 states and 3459 transitions. [2021-12-15 12:09:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:09:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,623 INFO L225 Difference]: With dead ends: 2181 [2021-12-15 12:09:18,624 INFO L226 Difference]: Without dead ends: 1963 [2021-12-15 12:09:18,625 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 12:09:18,626 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-12-15 12:09:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2021-12-15 12:09:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1959 states have (on average 1.5870342011230218) internal successors, (3109), 1960 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states 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 12:09:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3109 transitions. [2021-12-15 12:09:18,667 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3109 transitions. Word has length 77 [2021-12-15 12:09:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:18,667 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3109 transitions. [2021-12-15 12:09:18,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3109 transitions. [2021-12-15 12:09:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:09:18,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:18,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:18,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:09:18,669 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-12-15 12:09:18,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:18,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034512520] [2021-12-15 12:09:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:18,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:18,716 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 12:09:18,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034512520] [2021-12-15 12:09:18,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034512520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:18,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:18,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:18,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257598961] [2021-12-15 12:09:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:18,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:18,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:18,720 INFO L87 Difference]: Start difference. First operand 1961 states and 3109 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,753 INFO L93 Difference]: Finished difference Result 2733 states and 4319 transitions. [2021-12-15 12:09:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:09:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,761 INFO L225 Difference]: With dead ends: 2733 [2021-12-15 12:09:18,761 INFO L226 Difference]: Without dead ends: 2323 [2021-12-15 12:09:18,762 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 12:09:18,763 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-12-15 12:09:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2321. [2021-12-15 12:09:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2319 states have (on average 1.5804225959465288) internal successors, (3665), 2320 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states 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 12:09:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3665 transitions. [2021-12-15 12:09:18,800 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3665 transitions. Word has length 77 [2021-12-15 12:09:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:18,800 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3665 transitions. [2021-12-15 12:09:18,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3665 transitions. [2021-12-15 12:09:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:09:18,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:18,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:18,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:09:18,801 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-12-15 12:09:18,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:18,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888451952] [2021-12-15 12:09:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:18,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:18,831 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 12:09:18,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:18,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888451952] [2021-12-15 12:09:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888451952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:18,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:18,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:18,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934487814] [2021-12-15 12:09:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:18,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:18,834 INFO L87 Difference]: Start difference. First operand 2321 states and 3665 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,870 INFO L93 Difference]: Finished difference Result 3765 states and 5907 transitions. [2021-12-15 12:09:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:09:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,878 INFO L225 Difference]: With dead ends: 3765 [2021-12-15 12:09:18,878 INFO L226 Difference]: Without dead ends: 2995 [2021-12-15 12:09:18,880 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 12:09:18,881 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-12-15 12:09:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2993. [2021-12-15 12:09:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2991 states have (on average 1.5677031093279838) internal successors, (4689), 2992 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states 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 12:09:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4689 transitions. [2021-12-15 12:09:18,931 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4689 transitions. Word has length 77 [2021-12-15 12:09:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:18,932 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4689 transitions. [2021-12-15 12:09:18,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4689 transitions. [2021-12-15 12:09:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:09:18,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:18,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:18,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:09:18,933 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-12-15 12:09:18,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:18,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511228526] [2021-12-15 12:09:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:18,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:18,989 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 12:09:18,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511228526] [2021-12-15 12:09:18,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511228526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:18,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:18,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:18,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078068658] [2021-12-15 12:09:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:18,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:18,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:18,991 INFO L87 Difference]: Start difference. First operand 2993 states and 4689 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:19,514 INFO L93 Difference]: Finished difference Result 20297 states and 31389 transitions. [2021-12-15 12:09:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 12:09:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:09:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:19,576 INFO L225 Difference]: With dead ends: 20297 [2021-12-15 12:09:19,577 INFO L226 Difference]: Without dead ends: 18855 [2021-12-15 12:09:19,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-15 12:09:19,588 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 10553 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10553 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:19,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10553 Valid, 3392 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18855 states. [2021-12-15 12:09:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18855 to 4433. [2021-12-15 12:09:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4431 states have (on average 1.5457007447528774) internal successors, (6849), 4432 states have internal predecessors, (6849), 0 states have call successors, (0), 0 states 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 12:09:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 6849 transitions. [2021-12-15 12:09:19,823 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 6849 transitions. Word has length 77 [2021-12-15 12:09:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:19,824 INFO L470 AbstractCegarLoop]: Abstraction has 4433 states and 6849 transitions. [2021-12-15 12:09:19,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 6849 transitions. [2021-12-15 12:09:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:09:19,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:19,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:19,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:09:19,825 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2021-12-15 12:09:19,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:19,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306043567] [2021-12-15 12:09:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:19,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:19,855 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 12:09:19,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:19,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306043567] [2021-12-15 12:09:19,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306043567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:19,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:19,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:19,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436996320] [2021-12-15 12:09:19,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:19,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:19,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:19,857 INFO L87 Difference]: Start difference. First operand 4433 states and 6849 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 12:09:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:20,051 INFO L93 Difference]: Finished difference Result 9845 states and 15011 transitions. [2021-12-15 12:09:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:09:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:20,063 INFO L225 Difference]: With dead ends: 9845 [2021-12-15 12:09:20,063 INFO L226 Difference]: Without dead ends: 6963 [2021-12-15 12:09:20,066 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 12:09:20,067 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:20,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1671 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6963 states. [2021-12-15 12:09:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6963 to 6897. [2021-12-15 12:09:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5084844089920233) internal successors, (10401), 6896 states have internal predecessors, (10401), 0 states have call successors, (0), 0 states 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 12:09:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10401 transitions. [2021-12-15 12:09:20,258 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10401 transitions. Word has length 79 [2021-12-15 12:09:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:20,258 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10401 transitions. [2021-12-15 12:09:20,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 12:09:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10401 transitions. [2021-12-15 12:09:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:09:20,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:20,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:20,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:09:20,260 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2021-12-15 12:09:20,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:20,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729426794] [2021-12-15 12:09:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:20,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:20,410 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 12:09:20,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:20,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729426794] [2021-12-15 12:09:20,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729426794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:20,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:20,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:20,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289434837] [2021-12-15 12:09:20,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:20,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:20,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:20,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:20,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:20,412 INFO L87 Difference]: Start difference. First operand 6897 states and 10401 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 12:09:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:20,717 INFO L93 Difference]: Finished difference Result 12245 states and 18339 transitions. [2021-12-15 12:09:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:09:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:20,731 INFO L225 Difference]: With dead ends: 12245 [2021-12-15 12:09:20,731 INFO L226 Difference]: Without dead ends: 6899 [2021-12-15 12:09:20,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-15 12:09:20,739 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 7790 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7790 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:20,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7790 Valid, 2051 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-12-15 12:09:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6897. [2021-12-15 12:09:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.4992023205221174) internal successors, (10337), 6896 states have internal predecessors, (10337), 0 states have call successors, (0), 0 states 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 12:09:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10337 transitions. [2021-12-15 12:09:20,981 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10337 transitions. Word has length 79 [2021-12-15 12:09:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:20,982 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10337 transitions. [2021-12-15 12:09:20,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 12:09:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10337 transitions. [2021-12-15 12:09:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 12:09:20,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:20,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:20,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:09:20,984 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2021-12-15 12:09:20,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:20,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030399341] [2021-12-15 12:09:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:20,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:21,054 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 12:09:21,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:21,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030399341] [2021-12-15 12:09:21,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030399341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:21,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:21,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:09:21,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683076145] [2021-12-15 12:09:21,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:21,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:09:21,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:09:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:09:21,057 INFO L87 Difference]: Start difference. First operand 6897 states and 10337 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:21,289 INFO L93 Difference]: Finished difference Result 12243 states and 18210 transitions. [2021-12-15 12:09:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:09:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 12:09:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:21,302 INFO L225 Difference]: With dead ends: 12243 [2021-12-15 12:09:21,302 INFO L226 Difference]: Without dead ends: 6897 [2021-12-15 12:09:21,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:09:21,309 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4721 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4721 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:21,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4721 Valid, 3032 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-12-15 12:09:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6897. [2021-12-15 12:09:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.4899202320522118) internal successors, (10273), 6896 states have internal predecessors, (10273), 0 states have call successors, (0), 0 states 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 12:09:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10273 transitions. [2021-12-15 12:09:21,560 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10273 transitions. Word has length 80 [2021-12-15 12:09:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:21,560 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10273 transitions. [2021-12-15 12:09:21,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10273 transitions. [2021-12-15 12:09:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 12:09:21,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:21,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:21,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:09:21,562 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-12-15 12:09:21,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:21,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129117897] [2021-12-15 12:09:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:21,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:21,657 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 12:09:21,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:21,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129117897] [2021-12-15 12:09:21,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129117897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:21,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:21,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:21,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757050072] [2021-12-15 12:09:21,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:21,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:21,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:21,659 INFO L87 Difference]: Start difference. First operand 6897 states and 10273 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:22,019 INFO L93 Difference]: Finished difference Result 10867 states and 15980 transitions. [2021-12-15 12:09:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:09:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 12:09:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:22,041 INFO L225 Difference]: With dead ends: 10867 [2021-12-15 12:09:22,041 INFO L226 Difference]: Without dead ends: 10865 [2021-12-15 12:09:22,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 12:09:22,047 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 696 mSDsluCounter, 9179 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 10807 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:22,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 10807 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2021-12-15 12:09:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 7089. [2021-12-15 12:09:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7087 states have (on average 1.4721320728093692) internal successors, (10433), 7088 states have internal predecessors, (10433), 0 states have call successors, (0), 0 states 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 12:09:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 10433 transitions. [2021-12-15 12:09:22,413 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 10433 transitions. Word has length 80 [2021-12-15 12:09:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:22,413 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 10433 transitions. [2021-12-15 12:09:22,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 10433 transitions. [2021-12-15 12:09:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 12:09:22,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:22,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:22,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:09:22,415 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2021-12-15 12:09:22,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:22,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515739661] [2021-12-15 12:09:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:22,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:22,444 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 12:09:22,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515739661] [2021-12-15 12:09:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515739661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:22,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:22,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:22,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650414797] [2021-12-15 12:09:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:22,447 INFO L87 Difference]: Start difference. First operand 7089 states and 10433 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 12:09:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:22,883 INFO L93 Difference]: Finished difference Result 12728 states and 18631 transitions. [2021-12-15 12:09:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-15 12:09:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:22,907 INFO L225 Difference]: With dead ends: 12728 [2021-12-15 12:09:22,907 INFO L226 Difference]: Without dead ends: 9653 [2021-12-15 12:09:22,916 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 12:09:22,917 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 1523 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:22,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2021-12-15 12:09:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9651. [2021-12-15 12:09:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.4562130790755519) internal successors, (14051), 9650 states have internal predecessors, (14051), 0 states have call successors, (0), 0 states 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 12:09:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 14051 transitions. [2021-12-15 12:09:23,464 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 14051 transitions. Word has length 81 [2021-12-15 12:09:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 14051 transitions. [2021-12-15 12:09:23,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 12:09:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 14051 transitions. [2021-12-15 12:09:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:23,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:23,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:23,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:09:23,471 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-12-15 12:09:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625163326] [2021-12-15 12:09:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:23,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 12:09:23,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:23,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625163326] [2021-12-15 12:09:23,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625163326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:23,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:23,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:23,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015461461] [2021-12-15 12:09:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:23,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:23,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:23,574 INFO L87 Difference]: Start difference. First operand 9651 states and 14051 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 12:09:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:25,509 INFO L93 Difference]: Finished difference Result 59841 states and 85770 transitions. [2021-12-15 12:09:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:25,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 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 112 [2021-12-15 12:09:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:25,614 INFO L225 Difference]: With dead ends: 59841 [2021-12-15 12:09:25,614 INFO L226 Difference]: Without dead ends: 51743 [2021-12-15 12:09:25,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:25,630 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8634 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8634 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:25,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8634 Valid, 3833 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51743 states. [2021-12-15 12:09:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51743 to 17747. [2021-12-15 12:09:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17747 states, 17745 states have (on average 1.439222316145393) internal successors, (25539), 17746 states have internal predecessors, (25539), 0 states have call successors, (0), 0 states 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 12:09:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 25539 transitions. [2021-12-15 12:09:26,799 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 25539 transitions. Word has length 112 [2021-12-15 12:09:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 17747 states and 25539 transitions. [2021-12-15 12:09:26,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 12:09:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 25539 transitions. [2021-12-15 12:09:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:26,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:26,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:26,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:09:26,804 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash 964655004, now seen corresponding path program 1 times [2021-12-15 12:09:26,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248382419] [2021-12-15 12:09:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:26,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 12:09:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248382419] [2021-12-15 12:09:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248382419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:26,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:26,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:26,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661187622] [2021-12-15 12:09:26,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:26,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:26,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:26,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:26,871 INFO L87 Difference]: Start difference. First operand 17747 states and 25539 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:28,923 INFO L93 Difference]: Finished difference Result 67937 states and 97258 transitions. [2021-12-15 12:09:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:29,020 INFO L225 Difference]: With dead ends: 67937 [2021-12-15 12:09:29,021 INFO L226 Difference]: Without dead ends: 59839 [2021-12-15 12:09:29,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:29,040 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8455 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8455 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:29,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8455 Valid, 3903 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59839 states. [2021-12-15 12:09:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59839 to 29907. [2021-12-15 12:09:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29907 states, 29905 states have (on average 1.4275539207490386) internal successors, (42691), 29906 states have internal predecessors, (42691), 0 states have call successors, (0), 0 states 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 12:09:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29907 states to 29907 states and 42691 transitions. [2021-12-15 12:09:30,807 INFO L78 Accepts]: Start accepts. Automaton has 29907 states and 42691 transitions. Word has length 112 [2021-12-15 12:09:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:30,808 INFO L470 AbstractCegarLoop]: Abstraction has 29907 states and 42691 transitions. [2021-12-15 12:09:30,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29907 states and 42691 transitions. [2021-12-15 12:09:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:30,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:30,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:30,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:09:30,821 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2096294844, now seen corresponding path program 1 times [2021-12-15 12:09:30,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837039999] [2021-12-15 12:09:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:30,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 12:09:30,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:30,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837039999] [2021-12-15 12:09:30,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837039999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:30,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:30,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:30,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379450884] [2021-12-15 12:09:30,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:30,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:30,912 INFO L87 Difference]: Start difference. First operand 29907 states and 42691 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:33,884 INFO L93 Difference]: Finished difference Result 76033 states and 108746 transitions. [2021-12-15 12:09:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:34,005 INFO L225 Difference]: With dead ends: 76033 [2021-12-15 12:09:34,006 INFO L226 Difference]: Without dead ends: 67935 [2021-12-15 12:09:34,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:34,033 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8425 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8425 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:34,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8425 Valid, 3925 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67935 states. [2021-12-15 12:09:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67935 to 38003. [2021-12-15 12:09:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38003 states, 38001 states have (on average 1.425725638798979) internal successors, (54179), 38002 states have internal predecessors, (54179), 0 states have call successors, (0), 0 states 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 12:09:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38003 states to 38003 states and 54179 transitions. [2021-12-15 12:09:36,411 INFO L78 Accepts]: Start accepts. Automaton has 38003 states and 54179 transitions. Word has length 112 [2021-12-15 12:09:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:36,411 INFO L470 AbstractCegarLoop]: Abstraction has 38003 states and 54179 transitions. [2021-12-15 12:09:36,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 38003 states and 54179 transitions. [2021-12-15 12:09:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:36,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:36,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:36,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:09:36,421 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:36,422 INFO L85 PathProgramCache]: Analyzing trace with hash 860835804, now seen corresponding path program 1 times [2021-12-15 12:09:36,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:36,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515030741] [2021-12-15 12:09:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:36,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 12:09:36,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:36,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515030741] [2021-12-15 12:09:36,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515030741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:36,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:36,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:36,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718877253] [2021-12-15 12:09:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:36,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:36,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:36,493 INFO L87 Difference]: Start difference. First operand 38003 states and 54179 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:09:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:40,260 INFO L93 Difference]: Finished difference Result 84129 states and 120234 transitions. [2021-12-15 12:09:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 112 [2021-12-15 12:09:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:40,378 INFO L225 Difference]: With dead ends: 84129 [2021-12-15 12:09:40,378 INFO L226 Difference]: Without dead ends: 76031 [2021-12-15 12:09:40,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:40,405 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8497 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8497 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:40,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8497 Valid, 3944 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76031 states. [2021-12-15 12:09:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76031 to 46099. [2021-12-15 12:09:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46099 states, 46097 states have (on average 1.4245395578887996) internal successors, (65667), 46098 states have internal predecessors, (65667), 0 states have call successors, (0), 0 states 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 12:09:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46099 states to 46099 states and 65667 transitions. [2021-12-15 12:09:43,796 INFO L78 Accepts]: Start accepts. Automaton has 46099 states and 65667 transitions. Word has length 112 [2021-12-15 12:09:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:43,796 INFO L470 AbstractCegarLoop]: Abstraction has 46099 states and 65667 transitions. [2021-12-15 12:09:43,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:09:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 46099 states and 65667 transitions. [2021-12-15 12:09:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:43,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:43,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:43,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:09:43,807 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -560159748, now seen corresponding path program 1 times [2021-12-15 12:09:43,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:43,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069712327] [2021-12-15 12:09:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:43,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:09:43,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:43,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069712327] [2021-12-15 12:09:43,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069712327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:43,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:43,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:43,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385820883] [2021-12-15 12:09:43,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:43,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:43,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:43,888 INFO L87 Difference]: Start difference. First operand 46099 states and 65667 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 12:09:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:49,425 INFO L93 Difference]: Finished difference Result 92225 states and 131722 transitions. [2021-12-15 12:09:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:49,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 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 112 [2021-12-15 12:09:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:49,631 INFO L225 Difference]: With dead ends: 92225 [2021-12-15 12:09:49,632 INFO L226 Difference]: Without dead ends: 84127 [2021-12-15 12:09:49,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:49,677 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8607 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8607 SdHoareTripleChecker+Valid, 3905 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:49,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8607 Valid, 3905 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 12:09:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84127 states. [2021-12-15 12:09:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84127 to 54195. [2021-12-15 12:09:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54195 states, 54193 states have (on average 1.4237078589485728) internal successors, (77155), 54194 states have internal predecessors, (77155), 0 states have call successors, (0), 0 states 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 12:09:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54195 states to 54195 states and 77155 transitions. [2021-12-15 12:09:54,162 INFO L78 Accepts]: Start accepts. Automaton has 54195 states and 77155 transitions. Word has length 112 [2021-12-15 12:09:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 54195 states and 77155 transitions. [2021-12-15 12:09:54,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 12:09:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 54195 states and 77155 transitions. [2021-12-15 12:09:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 12:09:54,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:54,318 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:09:54,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:09:54,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1259528020, now seen corresponding path program 1 times [2021-12-15 12:09:54,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:54,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573976478] [2021-12-15 12:09:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:54,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:09:54,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:54,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573976478] [2021-12-15 12:09:54,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573976478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:54,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:54,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:54,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080482622] [2021-12-15 12:09:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:54,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:54,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:54,376 INFO L87 Difference]: Start difference. First operand 54195 states and 77155 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 12:09:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:56,496 INFO L93 Difference]: Finished difference Result 90841 states and 129613 transitions. [2021-12-15 12:09:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-15 12:09:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:56,555 INFO L225 Difference]: With dead ends: 90841 [2021-12-15 12:09:56,555 INFO L226 Difference]: Without dead ends: 38199 [2021-12-15 12:09:56,591 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 12:09:56,592 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 62 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:56,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38199 states. [2021-12-15 12:09:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38199 to 38197. [2021-12-15 12:09:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38197 states, 38195 states have (on average 1.4270454247938211) internal successors, (54506), 38196 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states 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 12:09:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38197 states to 38197 states and 54506 transitions. [2021-12-15 12:09:58,933 INFO L78 Accepts]: Start accepts. Automaton has 38197 states and 54506 transitions. Word has length 114 [2021-12-15 12:09:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:58,933 INFO L470 AbstractCegarLoop]: Abstraction has 38197 states and 54506 transitions. [2021-12-15 12:09:58,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 12:09:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38197 states and 54506 transitions. [2021-12-15 12:09:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 12:09:58,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:58,940 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:09:58,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 12:09:58,940 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1037894815, now seen corresponding path program 1 times [2021-12-15 12:09:58,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:58,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655464350] [2021-12-15 12:09:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:58,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:09:59,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:59,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655464350] [2021-12-15 12:09:59,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655464350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:59,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:59,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830486865] [2021-12-15 12:09:59,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:59,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:59,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:59,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:59,003 INFO L87 Difference]: Start difference. First operand 38197 states and 54506 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)