./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/openssl/s3_srvr.blast.16.i.cil-2.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 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:23:53,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:23:53,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:23:53,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:23:53,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:23:53,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:23:53,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:23:53,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:23:53,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:23:53,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:23:53,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:23:53,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:23:53,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:23:53,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:23:53,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:23:53,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:23:53,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:23:53,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:23:53,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:23:53,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:23:53,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:23:53,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:23:53,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:23:53,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:23:53,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:23:53,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:23:53,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:23:53,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:23:53,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:23:53,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:23:53,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:23:53,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:23:53,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:23:53,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:23:53,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:23:53,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:23:53,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:23:53,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:23:53,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:23:53,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:23:53,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:23:53,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:23:53,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:23:53,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:23:53,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:23:53,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:23:53,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:23:53,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:23:53,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:23:53,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:23:53,910 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:23:53,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:23:53,911 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:23:53,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:23:53,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:23:53,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:23:53,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:23:53,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:23:53,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:23:53,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:23:53,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:23:53,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:23:53,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:23:53,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:23:53,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:23:53,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:23:53,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:23:53,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:23:53,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:23:53,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:23:53,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:23:53,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:23:53,916 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:23:53,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:23:53,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:23:53,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:23:53,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 [2021-12-21 10:23:54,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:23:54,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:23:54,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:23:54,174 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:23:54,175 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:23:54,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-12-21 10:23:54,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2052eb6df/c09ce7c9d3f84bb7b94f33b6012856a6/FLAG27e26098e [2021-12-21 10:23:54,792 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:23:54,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-12-21 10:23:54,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2052eb6df/c09ce7c9d3f84bb7b94f33b6012856a6/FLAG27e26098e [2021-12-21 10:23:55,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2052eb6df/c09ce7c9d3f84bb7b94f33b6012856a6 [2021-12-21 10:23:55,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:23:55,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:23:55,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:23:55,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:23:55,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:23:55,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423de9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55, skipping insertion in model container [2021-12-21 10:23:55,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:23:55,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:23:55,525 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/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-12-21 10:23:55,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:23:55,548 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:23:55,691 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/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-12-21 10:23:55,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:23:55,710 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:23:55,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55 WrapperNode [2021-12-21 10:23:55,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:23:55,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:23:55,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:23:55,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:23:55,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,805 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 810 [2021-12-21 10:23:55,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:23:55,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:23:55,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:23:55,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:23:55,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:23:55,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:23:55,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:23:55,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:23:55,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (1/1) ... [2021-12-21 10:23:55,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:23:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:23:55,953 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) [2021-12-21 10:23:55,967 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 [2021-12-21 10:23:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:23:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 10:23:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:23:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:23:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 10:23:55,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:23:55,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:23:55,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:23:55,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:23:56,186 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:23:56,187 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:23:56,201 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:23:58,878 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-21 10:23:58,878 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-21 10:23:58,878 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:23:58,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:23:58,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:23:58,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:23:58 BoogieIcfgContainer [2021-12-21 10:23:58,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:23:58,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:23:58,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:23:58,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:23:58,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:23:55" (1/3) ... [2021-12-21 10:23:58,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fea8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:23:58, skipping insertion in model container [2021-12-21 10:23:58,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:55" (2/3) ... [2021-12-21 10:23:58,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fea8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:23:58, skipping insertion in model container [2021-12-21 10:23:58,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:23:58" (3/3) ... [2021-12-21 10:23:58,902 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-2.c [2021-12-21 10:23:58,907 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:23:58,907 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:23:58,967 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:23:58,977 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 [2021-12-21 10:23:58,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:23:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:23:59,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:59,029 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] [2021-12-21 10:23:59,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453347, now seen corresponding path program 1 times [2021-12-21 10:23:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546222953] [2021-12-21 10:23:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:59,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:23:59,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546222953] [2021-12-21 10:23:59,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546222953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:59,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:59,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:59,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698608606] [2021-12-21 10:23:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:59,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:59,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:59,589 INFO L87 Difference]: Start difference. First operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 0 states have call successors, (0), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:00,540 INFO L93 Difference]: Finished difference Result 447 states and 768 transitions. [2021-12-21 10:24:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-21 10:24:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:00,554 INFO L225 Difference]: With dead ends: 447 [2021-12-21 10:24:00,554 INFO L226 Difference]: Without dead ends: 273 [2021-12-21 10:24:00,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:00,561 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 172 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:00,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 495 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:24:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-21 10:24:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 186. [2021-12-21 10:24:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.627027027027027) internal successors, (301), 185 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 301 transitions. [2021-12-21 10:24:00,607 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 301 transitions. Word has length 46 [2021-12-21 10:24:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:00,608 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 301 transitions. [2021-12-21 10:24:00,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 301 transitions. [2021-12-21 10:24:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:24:00,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:00,611 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] [2021-12-21 10:24:00,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:24:00,611 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash 413309822, now seen corresponding path program 1 times [2021-12-21 10:24:00,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234122079] [2021-12-21 10:24:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:00,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:00,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:00,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234122079] [2021-12-21 10:24:00,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234122079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:00,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:00,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:00,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229619844] [2021-12-21 10:24:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:00,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:00,806 INFO L87 Difference]: Start difference. First operand 186 states and 301 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:01,291 INFO L93 Difference]: Finished difference Result 390 states and 629 transitions. [2021-12-21 10:24:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-21 10:24:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:01,294 INFO L225 Difference]: With dead ends: 390 [2021-12-21 10:24:01,294 INFO L226 Difference]: Without dead ends: 214 [2021-12-21 10:24:01,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:01,296 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 22 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:01,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 523 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:24:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-21 10:24:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 197. [2021-12-21 10:24:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.6326530612244898) internal successors, (320), 196 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 320 transitions. [2021-12-21 10:24:01,309 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 320 transitions. Word has length 47 [2021-12-21 10:24:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:01,310 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 320 transitions. [2021-12-21 10:24:01,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 320 transitions. [2021-12-21 10:24:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:24:01,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:01,312 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:01,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:24:01,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1553389893, now seen corresponding path program 1 times [2021-12-21 10:24:01,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:01,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132881041] [2021-12-21 10:24:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:01,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:01,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132881041] [2021-12-21 10:24:01,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132881041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:01,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:01,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:01,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266998920] [2021-12-21 10:24:01,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:01,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:01,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:01,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:01,455 INFO L87 Difference]: Start difference. First operand 197 states and 320 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:02,409 INFO L93 Difference]: Finished difference Result 538 states and 879 transitions. [2021-12-21 10:24:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-21 10:24:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:02,412 INFO L225 Difference]: With dead ends: 538 [2021-12-21 10:24:02,412 INFO L226 Difference]: Without dead ends: 362 [2021-12-21 10:24:02,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:02,414 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 161 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:02,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 704 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:24:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-21 10:24:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 229. [2021-12-21 10:24:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 228 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 371 transitions. [2021-12-21 10:24:02,430 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 371 transitions. Word has length 60 [2021-12-21 10:24:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:02,430 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 371 transitions. [2021-12-21 10:24:02,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 371 transitions. [2021-12-21 10:24:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:24:02,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:02,433 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:02,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:24:02,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864692, now seen corresponding path program 1 times [2021-12-21 10:24:02,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504607622] [2021-12-21 10:24:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:02,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:02,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:02,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504607622] [2021-12-21 10:24:02,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504607622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:02,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:02,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:02,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146335907] [2021-12-21 10:24:02,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:02,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:02,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:02,555 INFO L87 Difference]: Start difference. First operand 229 states and 371 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:03,430 INFO L93 Difference]: Finished difference Result 546 states and 882 transitions. [2021-12-21 10:24:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 10:24:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:03,433 INFO L225 Difference]: With dead ends: 546 [2021-12-21 10:24:03,433 INFO L226 Difference]: Without dead ends: 338 [2021-12-21 10:24:03,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:03,435 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 166 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:03,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:24:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-21 10:24:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 229. [2021-12-21 10:24:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 228 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 367 transitions. [2021-12-21 10:24:03,446 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 367 transitions. Word has length 61 [2021-12-21 10:24:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:03,446 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 367 transitions. [2021-12-21 10:24:03,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 367 transitions. [2021-12-21 10:24:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:24:03,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:03,449 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:03,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:24:03,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1129853920, now seen corresponding path program 1 times [2021-12-21 10:24:03,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:03,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752737048] [2021-12-21 10:24:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:03,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:03,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:03,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752737048] [2021-12-21 10:24:03,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752737048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:03,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:03,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:03,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899129725] [2021-12-21 10:24:03,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:03,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:03,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:03,558 INFO L87 Difference]: Start difference. First operand 229 states and 367 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:04,153 INFO L93 Difference]: Finished difference Result 453 states and 723 transitions. [2021-12-21 10:24:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 10:24:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:04,155 INFO L225 Difference]: With dead ends: 453 [2021-12-21 10:24:04,155 INFO L226 Difference]: Without dead ends: 245 [2021-12-21 10:24:04,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:04,156 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:04,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 527 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:24:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-21 10:24:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2021-12-21 10:24:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.605263157894737) internal successors, (366), 228 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 366 transitions. [2021-12-21 10:24:04,163 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 366 transitions. Word has length 61 [2021-12-21 10:24:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:04,163 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 366 transitions. [2021-12-21 10:24:04,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 366 transitions. [2021-12-21 10:24:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:24:04,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:04,165 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] [2021-12-21 10:24:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:24:04,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 324676919, now seen corresponding path program 1 times [2021-12-21 10:24:04,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:04,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045133676] [2021-12-21 10:24:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:04,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:04,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:04,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045133676] [2021-12-21 10:24:04,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045133676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:04,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:04,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:04,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207095550] [2021-12-21 10:24:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:04,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:04,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:04,282 INFO L87 Difference]: Start difference. First operand 229 states and 366 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:04,888 INFO L93 Difference]: Finished difference Result 452 states and 721 transitions. [2021-12-21 10:24:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 10:24:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:04,891 INFO L225 Difference]: With dead ends: 452 [2021-12-21 10:24:04,891 INFO L226 Difference]: Without dead ends: 244 [2021-12-21 10:24:04,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:04,892 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 19 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:04,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 529 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:24:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-21 10:24:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2021-12-21 10:24:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6008771929824561) internal successors, (365), 228 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 365 transitions. [2021-12-21 10:24:04,900 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 365 transitions. Word has length 61 [2021-12-21 10:24:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:04,900 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 365 transitions. [2021-12-21 10:24:04,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 365 transitions. [2021-12-21 10:24:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:24:04,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:04,902 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:04,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:24:04,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -624671241, now seen corresponding path program 1 times [2021-12-21 10:24:04,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003538315] [2021-12-21 10:24:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:04,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:04,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:04,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003538315] [2021-12-21 10:24:04,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003538315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:04,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:04,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:04,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588937604] [2021-12-21 10:24:04,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:04,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:04,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:04,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:04,997 INFO L87 Difference]: Start difference. First operand 229 states and 365 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:05,989 INFO L93 Difference]: Finished difference Result 546 states and 873 transitions. [2021-12-21 10:24:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:05,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 10:24:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:05,991 INFO L225 Difference]: With dead ends: 546 [2021-12-21 10:24:05,991 INFO L226 Difference]: Without dead ends: 338 [2021-12-21 10:24:05,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:05,993 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 159 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:05,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 10:24:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-21 10:24:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 230. [2021-12-21 10:24:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5895196506550218) internal successors, (364), 229 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 364 transitions. [2021-12-21 10:24:06,001 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 364 transitions. Word has length 61 [2021-12-21 10:24:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:06,001 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 364 transitions. [2021-12-21 10:24:06,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 364 transitions. [2021-12-21 10:24:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 10:24:06,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:06,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:24:06,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1608456996, now seen corresponding path program 1 times [2021-12-21 10:24:06,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712822263] [2021-12-21 10:24:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:06,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:06,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:06,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712822263] [2021-12-21 10:24:06,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712822263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:06,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:06,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:06,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014164918] [2021-12-21 10:24:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:06,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:06,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:06,121 INFO L87 Difference]: Start difference. First operand 230 states and 364 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:07,293 INFO L93 Difference]: Finished difference Result 452 states and 717 transitions. [2021-12-21 10:24:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-21 10:24:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:07,295 INFO L225 Difference]: With dead ends: 452 [2021-12-21 10:24:07,295 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 10:24:07,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:07,296 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 22 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:07,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:24:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 10:24:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-12-21 10:24:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5851528384279476) internal successors, (363), 229 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 363 transitions. [2021-12-21 10:24:07,303 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 363 transitions. Word has length 62 [2021-12-21 10:24:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:07,303 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 363 transitions. [2021-12-21 10:24:07,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 363 transitions. [2021-12-21 10:24:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 10:24:07,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:07,305 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:07,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:24:07,305 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 557952677, now seen corresponding path program 1 times [2021-12-21 10:24:07,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:07,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286585218] [2021-12-21 10:24:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:07,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:07,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286585218] [2021-12-21 10:24:07,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286585218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:07,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:07,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:07,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716010674] [2021-12-21 10:24:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:07,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:07,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:07,414 INFO L87 Difference]: Start difference. First operand 230 states and 363 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:08,219 INFO L93 Difference]: Finished difference Result 452 states and 716 transitions. [2021-12-21 10:24:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-21 10:24:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:08,221 INFO L225 Difference]: With dead ends: 452 [2021-12-21 10:24:08,221 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 10:24:08,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:08,222 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 20 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:08,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:24:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 10:24:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-12-21 10:24:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5807860262008733) internal successors, (362), 229 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2021-12-21 10:24:08,228 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 63 [2021-12-21 10:24:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:08,228 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2021-12-21 10:24:08,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2021-12-21 10:24:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 10:24:08,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:08,230 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:08,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:24:08,230 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1981706935, now seen corresponding path program 1 times [2021-12-21 10:24:08,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:08,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203036521] [2021-12-21 10:24:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:08,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:08,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203036521] [2021-12-21 10:24:08,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203036521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:08,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:08,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35609325] [2021-12-21 10:24:08,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:08,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:08,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:08,339 INFO L87 Difference]: Start difference. First operand 230 states and 362 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:09,049 INFO L93 Difference]: Finished difference Result 442 states and 702 transitions. [2021-12-21 10:24:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 10:24:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:09,050 INFO L225 Difference]: With dead ends: 442 [2021-12-21 10:24:09,050 INFO L226 Difference]: Without dead ends: 233 [2021-12-21 10:24:09,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:09,051 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 11 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:09,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 547 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-21 10:24:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2021-12-21 10:24:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5764192139737991) internal successors, (361), 229 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 361 transitions. [2021-12-21 10:24:09,057 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 361 transitions. Word has length 64 [2021-12-21 10:24:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:09,058 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 361 transitions. [2021-12-21 10:24:09,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 361 transitions. [2021-12-21 10:24:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 10:24:09,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:09,059 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:24:09,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:24:09,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1581555535, now seen corresponding path program 1 times [2021-12-21 10:24:09,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353520670] [2021-12-21 10:24:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:09,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:09,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353520670] [2021-12-21 10:24:09,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353520670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:09,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:09,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:09,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407487527] [2021-12-21 10:24:09,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:09,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:09,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:09,149 INFO L87 Difference]: Start difference. First operand 230 states and 361 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:09,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:09,824 INFO L93 Difference]: Finished difference Result 479 states and 757 transitions. [2021-12-21 10:24:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:09,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 10:24:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:09,826 INFO L225 Difference]: With dead ends: 479 [2021-12-21 10:24:09,826 INFO L226 Difference]: Without dead ends: 270 [2021-12-21 10:24:09,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:09,827 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 31 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:09,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 551 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-21 10:24:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 252. [2021-12-21 10:24:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5776892430278884) internal successors, (396), 251 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 396 transitions. [2021-12-21 10:24:09,834 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 396 transitions. Word has length 64 [2021-12-21 10:24:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 396 transitions. [2021-12-21 10:24:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 396 transitions. [2021-12-21 10:24:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 10:24:09,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:09,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:09,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:24:09,836 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash 993655827, now seen corresponding path program 1 times [2021-12-21 10:24:09,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:09,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350884062] [2021-12-21 10:24:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:09,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:09,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:09,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350884062] [2021-12-21 10:24:09,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350884062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:09,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:09,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:09,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418107097] [2021-12-21 10:24:09,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:09,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:09,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:09,971 INFO L87 Difference]: Start difference. First operand 252 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:10,674 INFO L93 Difference]: Finished difference Result 591 states and 937 transitions. [2021-12-21 10:24:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:10,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-21 10:24:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:10,676 INFO L225 Difference]: With dead ends: 591 [2021-12-21 10:24:10,677 INFO L226 Difference]: Without dead ends: 360 [2021-12-21 10:24:10,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:10,678 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 164 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:10,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-21 10:24:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2021-12-21 10:24:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5617529880478087) internal successors, (392), 251 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 392 transitions. [2021-12-21 10:24:10,685 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 392 transitions. Word has length 78 [2021-12-21 10:24:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:10,685 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 392 transitions. [2021-12-21 10:24:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 392 transitions. [2021-12-21 10:24:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 10:24:10,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:10,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:10,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:24:10,687 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:10,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:10,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1846780630, now seen corresponding path program 1 times [2021-12-21 10:24:10,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:10,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758773053] [2021-12-21 10:24:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:10,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:10,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758773053] [2021-12-21 10:24:10,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758773053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:10,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:10,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:10,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750432447] [2021-12-21 10:24:10,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:10,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:10,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:10,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:10,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:10,774 INFO L87 Difference]: Start difference. First operand 252 states and 392 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:11,219 INFO L93 Difference]: Finished difference Result 500 states and 782 transitions. [2021-12-21 10:24:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-21 10:24:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:11,221 INFO L225 Difference]: With dead ends: 500 [2021-12-21 10:24:11,221 INFO L226 Difference]: Without dead ends: 269 [2021-12-21 10:24:11,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:11,223 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 33 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:11,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 553 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:24:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-21 10:24:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 252. [2021-12-21 10:24:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5577689243027888) internal successors, (391), 251 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 391 transitions. [2021-12-21 10:24:11,229 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 391 transitions. Word has length 78 [2021-12-21 10:24:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:11,229 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 391 transitions. [2021-12-21 10:24:11,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 391 transitions. [2021-12-21 10:24:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 10:24:11,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:11,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-21 10:24:11,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:24:11,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1282217583, now seen corresponding path program 1 times [2021-12-21 10:24:11,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:11,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798484177] [2021-12-21 10:24:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:11,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:11,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798484177] [2021-12-21 10:24:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798484177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:11,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:11,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:11,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837663087] [2021-12-21 10:24:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:11,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:11,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:11,345 INFO L87 Difference]: Start difference. First operand 252 states and 391 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2021-12-21 10:24:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:12,083 INFO L93 Difference]: Finished difference Result 591 states and 927 transitions. [2021-12-21 10:24:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 [2021-12-21 10:24:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:12,085 INFO L225 Difference]: With dead ends: 591 [2021-12-21 10:24:12,085 INFO L226 Difference]: Without dead ends: 360 [2021-12-21 10:24:12,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:12,086 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 162 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:12,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-21 10:24:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2021-12-21 10:24:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5418326693227091) internal successors, (387), 251 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 387 transitions. [2021-12-21 10:24:12,093 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 387 transitions. Word has length 79 [2021-12-21 10:24:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:12,093 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 387 transitions. [2021-12-21 10:24:12,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2021-12-21 10:24:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 387 transitions. [2021-12-21 10:24:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 10:24:12,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:12,095 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:12,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:24:12,095 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:12,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1141353944, now seen corresponding path program 1 times [2021-12-21 10:24:12,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:12,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719909588] [2021-12-21 10:24:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:12,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:12,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719909588] [2021-12-21 10:24:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719909588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:12,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:12,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:12,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192403250] [2021-12-21 10:24:12,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:12,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:12,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:12,213 INFO L87 Difference]: Start difference. First operand 252 states and 387 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-12-21 10:24:13,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:13,896 INFO L93 Difference]: Finished difference Result 591 states and 919 transitions. [2021-12-21 10:24:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 [2021-12-21 10:24:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:13,898 INFO L225 Difference]: With dead ends: 591 [2021-12-21 10:24:13,898 INFO L226 Difference]: Without dead ends: 360 [2021-12-21 10:24:13,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:13,899 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 160 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:13,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 10:24:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-21 10:24:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2021-12-21 10:24:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5258964143426295) internal successors, (383), 251 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 383 transitions. [2021-12-21 10:24:13,907 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 383 transitions. Word has length 80 [2021-12-21 10:24:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:13,907 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 383 transitions. [2021-12-21 10:24:13,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-12-21 10:24:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 383 transitions. [2021-12-21 10:24:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 10:24:13,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:13,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:24:13,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:24:13,909 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1076136842, now seen corresponding path program 1 times [2021-12-21 10:24:13,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:13,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571311322] [2021-12-21 10:24:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:13,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:24:14,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571311322] [2021-12-21 10:24:14,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571311322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:14,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:14,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:14,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084332916] [2021-12-21 10:24:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:14,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:14,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:14,018 INFO L87 Difference]: Start difference. First operand 252 states and 383 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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) [2021-12-21 10:24:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:14,901 INFO L93 Difference]: Finished difference Result 581 states and 898 transitions. [2021-12-21 10:24:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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 [2021-12-21 10:24:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:14,903 INFO L225 Difference]: With dead ends: 581 [2021-12-21 10:24:14,903 INFO L226 Difference]: Without dead ends: 350 [2021-12-21 10:24:14,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:14,904 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 151 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:14,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 408 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:24:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-21 10:24:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 252. [2021-12-21 10:24:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5099601593625498) internal successors, (379), 251 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 379 transitions. [2021-12-21 10:24:14,912 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 379 transitions. Word has length 81 [2021-12-21 10:24:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:14,912 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 379 transitions. [2021-12-21 10:24:14,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 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) [2021-12-21 10:24:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 379 transitions. [2021-12-21 10:24:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 10:24:14,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:14,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:14,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:24:14,914 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash -226348903, now seen corresponding path program 1 times [2021-12-21 10:24:14,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:14,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741720651] [2021-12-21 10:24:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:14,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:15,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:15,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741720651] [2021-12-21 10:24:15,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741720651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:15,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:15,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:15,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358244445] [2021-12-21 10:24:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:15,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:15,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:15,045 INFO L87 Difference]: Start difference. First operand 252 states and 379 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:16,264 INFO L93 Difference]: Finished difference Result 581 states and 890 transitions. [2021-12-21 10:24:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 86 [2021-12-21 10:24:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:16,266 INFO L225 Difference]: With dead ends: 581 [2021-12-21 10:24:16,266 INFO L226 Difference]: Without dead ends: 350 [2021-12-21 10:24:16,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:16,267 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 125 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:16,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 434 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:24:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-21 10:24:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 275. [2021-12-21 10:24:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.5474452554744527) internal successors, (424), 274 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 424 transitions. [2021-12-21 10:24:16,274 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 424 transitions. Word has length 86 [2021-12-21 10:24:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:16,274 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 424 transitions. [2021-12-21 10:24:16,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 424 transitions. [2021-12-21 10:24:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 10:24:16,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:16,275 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:16,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:24:16,275 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 437102048, now seen corresponding path program 1 times [2021-12-21 10:24:16,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700975341] [2021-12-21 10:24:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:16,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:16,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:16,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700975341] [2021-12-21 10:24:16,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700975341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:16,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:16,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:16,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072640298] [2021-12-21 10:24:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:16,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:16,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:16,380 INFO L87 Difference]: Start difference. First operand 275 states and 424 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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) [2021-12-21 10:24:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:17,161 INFO L93 Difference]: Finished difference Result 618 states and 960 transitions. [2021-12-21 10:24:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:17,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 114 [2021-12-21 10:24:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:17,164 INFO L225 Difference]: With dead ends: 618 [2021-12-21 10:24:17,164 INFO L226 Difference]: Without dead ends: 364 [2021-12-21 10:24:17,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:17,165 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 88 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:17,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 529 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:24:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-21 10:24:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 309. [2021-12-21 10:24:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5487012987012987) internal successors, (477), 308 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 477 transitions. [2021-12-21 10:24:17,172 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 477 transitions. Word has length 114 [2021-12-21 10:24:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:17,173 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 477 transitions. [2021-12-21 10:24:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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) [2021-12-21 10:24:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 477 transitions. [2021-12-21 10:24:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 10:24:17,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:17,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:17,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:24:17,175 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash -530248606, now seen corresponding path program 1 times [2021-12-21 10:24:17,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342993431] [2021-12-21 10:24:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:17,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:17,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:17,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342993431] [2021-12-21 10:24:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342993431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:17,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:17,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:17,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853682041] [2021-12-21 10:24:17,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:17,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:17,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:17,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:17,320 INFO L87 Difference]: Start difference. First operand 309 states and 477 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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) [2021-12-21 10:24:19,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:19,681 INFO L93 Difference]: Finished difference Result 748 states and 1168 transitions. [2021-12-21 10:24:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 114 [2021-12-21 10:24:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:19,685 INFO L225 Difference]: With dead ends: 748 [2021-12-21 10:24:19,685 INFO L226 Difference]: Without dead ends: 460 [2021-12-21 10:24:19,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:19,686 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 131 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:19,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 418 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 10:24:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-21 10:24:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 339. [2021-12-21 10:24:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.5562130177514792) internal successors, (526), 338 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 526 transitions. [2021-12-21 10:24:19,696 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 526 transitions. Word has length 114 [2021-12-21 10:24:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:19,696 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 526 transitions. [2021-12-21 10:24:19,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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) [2021-12-21 10:24:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 526 transitions. [2021-12-21 10:24:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 10:24:19,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:19,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:24:19,698 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 766254903, now seen corresponding path program 1 times [2021-12-21 10:24:19,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876034148] [2021-12-21 10:24:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:19,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:19,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876034148] [2021-12-21 10:24:19,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876034148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:19,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:19,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:19,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056616471] [2021-12-21 10:24:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:19,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:19,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:19,805 INFO L87 Difference]: Start difference. First operand 339 states and 526 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:20,547 INFO L93 Difference]: Finished difference Result 772 states and 1203 transitions. [2021-12-21 10:24:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 120 [2021-12-21 10:24:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:20,550 INFO L225 Difference]: With dead ends: 772 [2021-12-21 10:24:20,550 INFO L226 Difference]: Without dead ends: 454 [2021-12-21 10:24:20,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:20,551 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:20,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 406 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-21 10:24:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 376. [2021-12-21 10:24:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.56) internal successors, (585), 375 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2021-12-21 10:24:20,561 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 120 [2021-12-21 10:24:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:20,561 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2021-12-21 10:24:20,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2021-12-21 10:24:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 10:24:20,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:20,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:20,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:24:20,563 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 183105856, now seen corresponding path program 1 times [2021-12-21 10:24:20,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066524742] [2021-12-21 10:24:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:20,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:20,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:20,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066524742] [2021-12-21 10:24:20,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066524742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:20,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:20,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:20,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969720798] [2021-12-21 10:24:20,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:20,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:20,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:20,707 INFO L87 Difference]: Start difference. First operand 376 states and 585 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:21,959 INFO L93 Difference]: Finished difference Result 817 states and 1276 transitions. [2021-12-21 10:24:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 121 [2021-12-21 10:24:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:21,962 INFO L225 Difference]: With dead ends: 817 [2021-12-21 10:24:21,962 INFO L226 Difference]: Without dead ends: 462 [2021-12-21 10:24:21,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:21,963 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 77 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:21,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 531 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:24:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-21 10:24:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 416. [2021-12-21 10:24:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5614457831325301) internal successors, (648), 415 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 648 transitions. [2021-12-21 10:24:21,974 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 648 transitions. Word has length 121 [2021-12-21 10:24:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:21,974 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 648 transitions. [2021-12-21 10:24:21,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 648 transitions. [2021-12-21 10:24:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 10:24:21,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:21,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:21,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:24:21,976 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1022139518, now seen corresponding path program 1 times [2021-12-21 10:24:21,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:21,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483269965] [2021-12-21 10:24:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:21,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 10:24:22,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:22,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483269965] [2021-12-21 10:24:22,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483269965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:22,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:22,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:22,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442724303] [2021-12-21 10:24:22,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:22,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:22,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:22,152 INFO L87 Difference]: Start difference. First operand 416 states and 648 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:23,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:24,004 INFO L93 Difference]: Finished difference Result 848 states and 1325 transitions. [2021-12-21 10:24:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 121 [2021-12-21 10:24:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:24,007 INFO L225 Difference]: With dead ends: 848 [2021-12-21 10:24:24,007 INFO L226 Difference]: Without dead ends: 453 [2021-12-21 10:24:24,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:24,008 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 28 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:24,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 631 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 10:24:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-21 10:24:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 440. [2021-12-21 10:24:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5558086560364466) internal successors, (683), 439 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 683 transitions. [2021-12-21 10:24:24,018 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 683 transitions. Word has length 121 [2021-12-21 10:24:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:24,018 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 683 transitions. [2021-12-21 10:24:24,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 683 transitions. [2021-12-21 10:24:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 10:24:24,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:24,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:24,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:24:24,020 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash -808576153, now seen corresponding path program 1 times [2021-12-21 10:24:24,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:24,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514149923] [2021-12-21 10:24:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:24,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:24,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514149923] [2021-12-21 10:24:24,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514149923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:24,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:24,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:24,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957086316] [2021-12-21 10:24:24,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:24,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:24,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:24,154 INFO L87 Difference]: Start difference. First operand 440 states and 683 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:25,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:26,271 INFO L93 Difference]: Finished difference Result 897 states and 1395 transitions. [2021-12-21 10:24:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 128 [2021-12-21 10:24:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:26,273 INFO L225 Difference]: With dead ends: 897 [2021-12-21 10:24:26,274 INFO L226 Difference]: Without dead ends: 478 [2021-12-21 10:24:26,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:26,275 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 61 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:26,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 537 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 10:24:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-12-21 10:24:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 443. [2021-12-21 10:24:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5520361990950227) internal successors, (686), 442 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 686 transitions. [2021-12-21 10:24:26,284 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 686 transitions. Word has length 128 [2021-12-21 10:24:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:26,284 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 686 transitions. [2021-12-21 10:24:26,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 686 transitions. [2021-12-21 10:24:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 10:24:26,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:26,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:26,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:24:26,287 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1942673447, now seen corresponding path program 1 times [2021-12-21 10:24:26,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:26,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656955604] [2021-12-21 10:24:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:26,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 10:24:26,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656955604] [2021-12-21 10:24:26,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656955604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:26,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:26,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:26,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118573698] [2021-12-21 10:24:26,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:26,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:26,384 INFO L87 Difference]: Start difference. First operand 443 states and 686 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:27,118 INFO L93 Difference]: Finished difference Result 899 states and 1396 transitions. [2021-12-21 10:24:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-21 10:24:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:27,121 INFO L225 Difference]: With dead ends: 899 [2021-12-21 10:24:27,121 INFO L226 Difference]: Without dead ends: 477 [2021-12-21 10:24:27,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:27,122 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 83 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:27,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 539 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-21 10:24:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 443. [2021-12-21 10:24:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5497737556561086) internal successors, (685), 442 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 685 transitions. [2021-12-21 10:24:27,146 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 685 transitions. Word has length 135 [2021-12-21 10:24:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:27,147 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 685 transitions. [2021-12-21 10:24:27,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 685 transitions. [2021-12-21 10:24:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 10:24:27,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:27,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:27,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:24:27,149 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1914173157, now seen corresponding path program 1 times [2021-12-21 10:24:27,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:27,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092130444] [2021-12-21 10:24:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:27,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 10:24:27,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092130444] [2021-12-21 10:24:27,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092130444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:27,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:27,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:27,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508096474] [2021-12-21 10:24:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:27,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:27,255 INFO L87 Difference]: Start difference. First operand 443 states and 685 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:27,817 INFO L93 Difference]: Finished difference Result 877 states and 1362 transitions. [2021-12-21 10:24:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-21 10:24:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:27,819 INFO L225 Difference]: With dead ends: 877 [2021-12-21 10:24:27,819 INFO L226 Difference]: Without dead ends: 455 [2021-12-21 10:24:27,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:27,820 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 33 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:27,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 631 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:24:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-21 10:24:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 443. [2021-12-21 10:24:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5475113122171946) internal successors, (684), 442 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 684 transitions. [2021-12-21 10:24:27,830 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 684 transitions. Word has length 135 [2021-12-21 10:24:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:27,830 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 684 transitions. [2021-12-21 10:24:27,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 684 transitions. [2021-12-21 10:24:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 10:24:27,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:27,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:27,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 10:24:27,832 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1862166372, now seen corresponding path program 1 times [2021-12-21 10:24:27,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:27,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146593741] [2021-12-21 10:24:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:27,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-21 10:24:27,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:27,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146593741] [2021-12-21 10:24:27,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146593741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:27,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:27,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:27,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98991130] [2021-12-21 10:24:27,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:27,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:27,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:27,936 INFO L87 Difference]: Start difference. First operand 443 states and 684 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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) [2021-12-21 10:24:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:29,044 INFO L93 Difference]: Finished difference Result 980 states and 1518 transitions. [2021-12-21 10:24:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:29,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 141 [2021-12-21 10:24:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:29,047 INFO L225 Difference]: With dead ends: 980 [2021-12-21 10:24:29,047 INFO L226 Difference]: Without dead ends: 558 [2021-12-21 10:24:29,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:29,048 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 134 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:29,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 434 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 10:24:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-21 10:24:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 473. [2021-12-21 10:24:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5381355932203389) internal successors, (726), 472 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 726 transitions. [2021-12-21 10:24:29,058 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 726 transitions. Word has length 141 [2021-12-21 10:24:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:29,058 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 726 transitions. [2021-12-21 10:24:29,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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) [2021-12-21 10:24:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 726 transitions. [2021-12-21 10:24:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 10:24:29,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:29,060 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:24:29,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:24:29,060 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1844194602, now seen corresponding path program 1 times [2021-12-21 10:24:29,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:29,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984409317] [2021-12-21 10:24:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:29,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-21 10:24:29,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984409317] [2021-12-21 10:24:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984409317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:29,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:29,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:29,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630168793] [2021-12-21 10:24:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:29,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:29,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:29,164 INFO L87 Difference]: Start difference. First operand 473 states and 726 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 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) [2021-12-21 10:24:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:29,821 INFO L93 Difference]: Finished difference Result 1000 states and 1538 transitions. [2021-12-21 10:24:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:29,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 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 142 [2021-12-21 10:24:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:29,824 INFO L225 Difference]: With dead ends: 1000 [2021-12-21 10:24:29,824 INFO L226 Difference]: Without dead ends: 548 [2021-12-21 10:24:29,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:29,825 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:29,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 406 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:24:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-21 10:24:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 473. [2021-12-21 10:24:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5254237288135593) internal successors, (720), 472 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 720 transitions. [2021-12-21 10:24:29,834 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 720 transitions. Word has length 142 [2021-12-21 10:24:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:29,835 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 720 transitions. [2021-12-21 10:24:29,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 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) [2021-12-21 10:24:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 720 transitions. [2021-12-21 10:24:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 10:24:29,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:29,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:24:29,837 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2025405034, now seen corresponding path program 1 times [2021-12-21 10:24:29,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014091163] [2021-12-21 10:24:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:29,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 10:24:29,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:29,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014091163] [2021-12-21 10:24:29,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014091163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:29,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:29,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:29,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677726287] [2021-12-21 10:24:29,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:29,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:29,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:29,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:29,967 INFO L87 Difference]: Start difference. First operand 473 states and 720 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:31,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:31,761 INFO L93 Difference]: Finished difference Result 957 states and 1462 transitions. [2021-12-21 10:24:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 143 [2021-12-21 10:24:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:31,764 INFO L225 Difference]: With dead ends: 957 [2021-12-21 10:24:31,764 INFO L226 Difference]: Without dead ends: 505 [2021-12-21 10:24:31,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:31,765 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 73 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:31,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 557 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 10:24:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-21 10:24:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2021-12-21 10:24:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5233050847457628) internal successors, (719), 472 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 719 transitions. [2021-12-21 10:24:31,776 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 719 transitions. Word has length 143 [2021-12-21 10:24:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:31,776 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 719 transitions. [2021-12-21 10:24:31,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 719 transitions. [2021-12-21 10:24:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 10:24:31,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:31,778 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:31,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:24:31,778 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -372065496, now seen corresponding path program 1 times [2021-12-21 10:24:31,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339340818] [2021-12-21 10:24:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:31,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 10:24:31,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339340818] [2021-12-21 10:24:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339340818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:31,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:31,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489858350] [2021-12-21 10:24:31,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:31,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:31,876 INFO L87 Difference]: Start difference. First operand 473 states and 719 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:31,959 INFO L93 Difference]: Finished difference Result 1374 states and 2105 transitions. [2021-12-21 10:24:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:31,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 143 [2021-12-21 10:24:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:31,963 INFO L225 Difference]: With dead ends: 1374 [2021-12-21 10:24:31,963 INFO L226 Difference]: Without dead ends: 922 [2021-12-21 10:24:31,964 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 [2021-12-21 10:24:31,964 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 151 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:31,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 443 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-12-21 10:24:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2021-12-21 10:24:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.511400651465798) internal successors, (1392), 921 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1392 transitions. [2021-12-21 10:24:31,981 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1392 transitions. Word has length 143 [2021-12-21 10:24:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:31,982 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1392 transitions. [2021-12-21 10:24:31,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1392 transitions. [2021-12-21 10:24:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 10:24:31,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:31,985 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:31,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 10:24:31,985 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2056193126, now seen corresponding path program 1 times [2021-12-21 10:24:31,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:31,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146036580] [2021-12-21 10:24:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:31,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-21 10:24:32,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146036580] [2021-12-21 10:24:32,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146036580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:32,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:32,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:32,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870352362] [2021-12-21 10:24:32,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:32,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:32,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:32,094 INFO L87 Difference]: Start difference. First operand 922 states and 1392 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:32,139 INFO L93 Difference]: Finished difference Result 1850 states and 2796 transitions. [2021-12-21 10:24:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-21 10:24:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:32,143 INFO L225 Difference]: With dead ends: 1850 [2021-12-21 10:24:32,143 INFO L226 Difference]: Without dead ends: 949 [2021-12-21 10:24:32,144 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 [2021-12-21 10:24:32,145 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:32,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 428 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:24:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-12-21 10:24:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 949. [2021-12-21 10:24:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 1.5052742616033756) internal successors, (1427), 948 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1427 transitions. [2021-12-21 10:24:32,164 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1427 transitions. Word has length 143 [2021-12-21 10:24:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:32,164 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1427 transitions. [2021-12-21 10:24:32,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1427 transitions. [2021-12-21 10:24:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 10:24:32,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:32,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:32,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 10:24:32,180 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash 5784228, now seen corresponding path program 1 times [2021-12-21 10:24:32,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801112637] [2021-12-21 10:24:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:32,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-21 10:24:32,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801112637] [2021-12-21 10:24:32,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801112637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:32,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:32,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:32,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644611391] [2021-12-21 10:24:32,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:32,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:32,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:32,261 INFO L87 Difference]: Start difference. First operand 949 states and 1427 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) [2021-12-21 10:24:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:32,301 INFO L93 Difference]: Finished difference Result 1879 states and 2832 transitions. [2021-12-21 10:24:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:32,301 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 143 [2021-12-21 10:24:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:32,304 INFO L225 Difference]: With dead ends: 1879 [2021-12-21 10:24:32,305 INFO L226 Difference]: Without dead ends: 951 [2021-12-21 10:24:32,306 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 [2021-12-21 10:24:32,307 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:32,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 407 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:24:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-12-21 10:24:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2021-12-21 10:24:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.5042105263157894) internal successors, (1429), 950 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1429 transitions. [2021-12-21 10:24:32,326 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1429 transitions. Word has length 143 [2021-12-21 10:24:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:32,326 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1429 transitions. [2021-12-21 10:24:32,326 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) [2021-12-21 10:24:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1429 transitions. [2021-12-21 10:24:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 10:24:32,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:32,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-21 10:24:32,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 10:24:32,330 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2075454910, now seen corresponding path program 1 times [2021-12-21 10:24:32,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611588358] [2021-12-21 10:24:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:32,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 10:24:32,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:32,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611588358] [2021-12-21 10:24:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611588358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:32,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:32,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:32,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621409555] [2021-12-21 10:24:32,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:32,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:32,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:32,455 INFO L87 Difference]: Start difference. First operand 951 states and 1429 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:32,530 INFO L93 Difference]: Finished difference Result 2328 states and 3523 transitions. [2021-12-21 10:24:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 145 [2021-12-21 10:24:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:32,536 INFO L225 Difference]: With dead ends: 2328 [2021-12-21 10:24:32,536 INFO L226 Difference]: Without dead ends: 1400 [2021-12-21 10:24:32,538 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 [2021-12-21 10:24:32,538 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:32,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 588 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-12-21 10:24:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2021-12-21 10:24:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.5025017869907076) internal successors, (2102), 1399 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2102 transitions. [2021-12-21 10:24:32,567 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2102 transitions. Word has length 145 [2021-12-21 10:24:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:32,568 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 2102 transitions. [2021-12-21 10:24:32,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2102 transitions. [2021-12-21 10:24:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-21 10:24:32,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:32,572 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-12-21 10:24:32,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 10:24:32,572 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1084473730, now seen corresponding path program 1 times [2021-12-21 10:24:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979575632] [2021-12-21 10:24:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:32,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-21 10:24:32,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979575632] [2021-12-21 10:24:32,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979575632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:32,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:32,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:32,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049596010] [2021-12-21 10:24:32,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:32,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:32,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:32,682 INFO L87 Difference]: Start difference. First operand 1400 states and 2102 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:33,381 INFO L93 Difference]: Finished difference Result 2930 states and 4405 transitions. [2021-12-21 10:24:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:33,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 174 [2021-12-21 10:24:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:33,386 INFO L225 Difference]: With dead ends: 2930 [2021-12-21 10:24:33,386 INFO L226 Difference]: Without dead ends: 1553 [2021-12-21 10:24:33,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:33,389 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 42 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:33,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 647 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:24:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-12-21 10:24:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1484. [2021-12-21 10:24:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 1.5043830074173972) internal successors, (2231), 1483 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2231 transitions. [2021-12-21 10:24:33,417 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2231 transitions. Word has length 174 [2021-12-21 10:24:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2231 transitions. [2021-12-21 10:24:33,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2231 transitions. [2021-12-21 10:24:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-21 10:24:33,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:33,422 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-12-21 10:24:33,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 10:24:33,422 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1196950761, now seen corresponding path program 1 times [2021-12-21 10:24:33,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119006427] [2021-12-21 10:24:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:33,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-21 10:24:33,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119006427] [2021-12-21 10:24:33,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119006427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:33,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:33,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:33,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598402863] [2021-12-21 10:24:33,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:33,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:33,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:33,533 INFO L87 Difference]: Start difference. First operand 1484 states and 2231 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:35,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:35,305 INFO L93 Difference]: Finished difference Result 3162 states and 4730 transitions. [2021-12-21 10:24:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:35,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 188 [2021-12-21 10:24:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:35,311 INFO L225 Difference]: With dead ends: 3162 [2021-12-21 10:24:35,311 INFO L226 Difference]: Without dead ends: 1701 [2021-12-21 10:24:35,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:35,314 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 145 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:35,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 408 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 10:24:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-12-21 10:24:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1484. [2021-12-21 10:24:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 1.4902225219150371) internal successors, (2210), 1483 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2210 transitions. [2021-12-21 10:24:35,347 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2210 transitions. Word has length 188 [2021-12-21 10:24:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:35,347 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2210 transitions. [2021-12-21 10:24:35,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2210 transitions. [2021-12-21 10:24:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-21 10:24:35,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:35,352 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:35,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 10:24:35,352 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1909029588, now seen corresponding path program 1 times [2021-12-21 10:24:35,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:35,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548549076] [2021-12-21 10:24:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:35,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 10:24:35,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548549076] [2021-12-21 10:24:35,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548549076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073534751] [2021-12-21 10:24:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:35,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:24:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:24:35,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:24:35,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:24:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:24:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:24:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-21 10:24:36,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:24:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073534751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:36,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:24:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 10:24:36,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552692800] [2021-12-21 10:24:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:36,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:36,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:24:36,580 INFO L87 Difference]: Start difference. First operand 1484 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:36,685 INFO L93 Difference]: Finished difference Result 3423 states and 5122 transitions. [2021-12-21 10:24:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:36,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 196 [2021-12-21 10:24:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:36,691 INFO L225 Difference]: With dead ends: 3423 [2021-12-21 10:24:36,691 INFO L226 Difference]: Without dead ends: 1962 [2021-12-21 10:24:36,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:24:36,693 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 163 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:36,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-12-21 10:24:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-12-21 10:24:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.4915859255481898) internal successors, (2925), 1961 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2925 transitions. [2021-12-21 10:24:36,738 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2925 transitions. Word has length 196 [2021-12-21 10:24:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:36,738 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2925 transitions. [2021-12-21 10:24:36,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2925 transitions. [2021-12-21 10:24:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-21 10:24:36,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:36,742 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:36,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:24:36,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-21 10:24:36,952 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash -489247903, now seen corresponding path program 1 times [2021-12-21 10:24:36,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:36,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298102539] [2021-12-21 10:24:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:36,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-21 10:24:37,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:37,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298102539] [2021-12-21 10:24:37,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298102539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:37,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:37,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:37,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808250574] [2021-12-21 10:24:37,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:37,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:37,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:37,092 INFO L87 Difference]: Start difference. First operand 1962 states and 2925 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:37,182 INFO L93 Difference]: Finished difference Result 4379 states and 6552 transitions. [2021-12-21 10:24:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:37,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 198 [2021-12-21 10:24:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:37,190 INFO L225 Difference]: With dead ends: 4379 [2021-12-21 10:24:37,190 INFO L226 Difference]: Without dead ends: 2440 [2021-12-21 10:24:37,192 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 [2021-12-21 10:24:37,193 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:37,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-12-21 10:24:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2440. [2021-12-21 10:24:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.4928249282492825) internal successors, (3641), 2439 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3641 transitions. [2021-12-21 10:24:37,274 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3641 transitions. Word has length 198 [2021-12-21 10:24:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:37,275 INFO L470 AbstractCegarLoop]: Abstraction has 2440 states and 3641 transitions. [2021-12-21 10:24:37,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3641 transitions. [2021-12-21 10:24:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-21 10:24:37,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:37,281 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:37,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 10:24:37,281 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1545883921, now seen corresponding path program 1 times [2021-12-21 10:24:37,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:37,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025672594] [2021-12-21 10:24:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:37,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-21 10:24:37,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:37,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025672594] [2021-12-21 10:24:37,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025672594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:37,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:37,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:37,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765131387] [2021-12-21 10:24:37,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:37,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:37,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:37,433 INFO L87 Difference]: Start difference. First operand 2440 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:37,538 INFO L93 Difference]: Finished difference Result 5335 states and 7984 transitions. [2021-12-21 10:24:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 237 [2021-12-21 10:24:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:37,551 INFO L225 Difference]: With dead ends: 5335 [2021-12-21 10:24:37,551 INFO L226 Difference]: Without dead ends: 2918 [2021-12-21 10:24:37,553 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 [2021-12-21 10:24:37,554 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 167 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:37,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 382 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2021-12-21 10:24:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2918. [2021-12-21 10:24:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 1.4940006856359274) internal successors, (4358), 2917 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 4358 transitions. [2021-12-21 10:24:37,645 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 4358 transitions. Word has length 237 [2021-12-21 10:24:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:37,646 INFO L470 AbstractCegarLoop]: Abstraction has 2918 states and 4358 transitions. [2021-12-21 10:24:37,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 4358 transitions. [2021-12-21 10:24:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-21 10:24:37,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:37,652 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:37,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 10:24:37,653 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1779514151, now seen corresponding path program 1 times [2021-12-21 10:24:37,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40345787] [2021-12-21 10:24:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:37,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-21 10:24:37,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40345787] [2021-12-21 10:24:37,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40345787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:37,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:37,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:37,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817338809] [2021-12-21 10:24:37,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:37,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:37,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:37,793 INFO L87 Difference]: Start difference. First operand 2918 states and 4358 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:37,903 INFO L93 Difference]: Finished difference Result 6291 states and 9418 transitions. [2021-12-21 10:24:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 239 [2021-12-21 10:24:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:37,920 INFO L225 Difference]: With dead ends: 6291 [2021-12-21 10:24:37,920 INFO L226 Difference]: Without dead ends: 3396 [2021-12-21 10:24:37,924 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 [2021-12-21 10:24:37,925 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 168 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:37,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 381 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3396 states. [2021-12-21 10:24:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3396 to 3396. [2021-12-21 10:24:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 1.495139911634757) internal successors, (5076), 3395 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5076 transitions. [2021-12-21 10:24:38,028 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5076 transitions. Word has length 239 [2021-12-21 10:24:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:38,029 INFO L470 AbstractCegarLoop]: Abstraction has 3396 states and 5076 transitions. [2021-12-21 10:24:38,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5076 transitions. [2021-12-21 10:24:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-21 10:24:38,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:38,036 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 10:24:38,037 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash 29939523, now seen corresponding path program 1 times [2021-12-21 10:24:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121765975] [2021-12-21 10:24:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:38,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-12-21 10:24:38,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121765975] [2021-12-21 10:24:38,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121765975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:38,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:38,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:38,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141050359] [2021-12-21 10:24:38,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:38,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:38,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:38,195 INFO L87 Difference]: Start difference. First operand 3396 states and 5076 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:38,333 INFO L93 Difference]: Finished difference Result 7240 states and 10843 transitions. [2021-12-21 10:24:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 271 [2021-12-21 10:24:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:38,341 INFO L225 Difference]: With dead ends: 7240 [2021-12-21 10:24:38,341 INFO L226 Difference]: Without dead ends: 3867 [2021-12-21 10:24:38,346 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 [2021-12-21 10:24:38,346 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:38,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 587 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-12-21 10:24:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3867. [2021-12-21 10:24:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 1.494568028970512) internal successors, (5778), 3866 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 5778 transitions. [2021-12-21 10:24:38,433 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 5778 transitions. Word has length 271 [2021-12-21 10:24:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 3867 states and 5778 transitions. [2021-12-21 10:24:38,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 5778 transitions. [2021-12-21 10:24:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-21 10:24:38,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:38,441 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:38,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-21 10:24:38,441 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash 278086017, now seen corresponding path program 1 times [2021-12-21 10:24:38,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:38,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772305278] [2021-12-21 10:24:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:38,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-21 10:24:38,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772305278] [2021-12-21 10:24:38,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772305278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:38,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:38,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:38,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42223765] [2021-12-21 10:24:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:38,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:38,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:38,586 INFO L87 Difference]: Start difference. First operand 3867 states and 5778 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:38,718 INFO L93 Difference]: Finished difference Result 8156 states and 12209 transitions. [2021-12-21 10:24:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:38,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 271 [2021-12-21 10:24:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:38,732 INFO L225 Difference]: With dead ends: 8156 [2021-12-21 10:24:38,732 INFO L226 Difference]: Without dead ends: 4312 [2021-12-21 10:24:38,736 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 [2021-12-21 10:24:38,737 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 158 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:38,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 590 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-12-21 10:24:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4312. [2021-12-21 10:24:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 4311 states have (on average 1.4936209696126188) internal successors, (6439), 4311 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6439 transitions. [2021-12-21 10:24:38,823 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6439 transitions. Word has length 271 [2021-12-21 10:24:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:38,824 INFO L470 AbstractCegarLoop]: Abstraction has 4312 states and 6439 transitions. [2021-12-21 10:24:38,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6439 transitions. [2021-12-21 10:24:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-21 10:24:38,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:38,833 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:38,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 10:24:38,834 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1434461779, now seen corresponding path program 1 times [2021-12-21 10:24:38,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:38,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248832374] [2021-12-21 10:24:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:38,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2021-12-21 10:24:39,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:39,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248832374] [2021-12-21 10:24:39,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248832374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:39,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:39,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:39,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427412815] [2021-12-21 10:24:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:39,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:39,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:39,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:39,052 INFO L87 Difference]: Start difference. First operand 4312 states and 6439 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:39,180 INFO L93 Difference]: Finished difference Result 9079 states and 13580 transitions. [2021-12-21 10:24:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 346 [2021-12-21 10:24:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:39,190 INFO L225 Difference]: With dead ends: 9079 [2021-12-21 10:24:39,190 INFO L226 Difference]: Without dead ends: 4790 [2021-12-21 10:24:39,196 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 [2021-12-21 10:24:39,196 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:39,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 378 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2021-12-21 10:24:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4790. [2021-12-21 10:24:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 4789 states have (on average 1.4950929212779285) internal successors, (7160), 4789 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 7160 transitions. [2021-12-21 10:24:39,292 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 7160 transitions. Word has length 346 [2021-12-21 10:24:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:39,293 INFO L470 AbstractCegarLoop]: Abstraction has 4790 states and 7160 transitions. [2021-12-21 10:24:39,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 7160 transitions. [2021-12-21 10:24:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-12-21 10:24:39,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:39,302 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:39,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 10:24:39,303 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1169005770, now seen corresponding path program 1 times [2021-12-21 10:24:39,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:39,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417517456] [2021-12-21 10:24:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:39,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-12-21 10:24:39,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:39,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417517456] [2021-12-21 10:24:39,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417517456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:39,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:39,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:39,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607358795] [2021-12-21 10:24:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:39,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:39,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:39,524 INFO L87 Difference]: Start difference. First operand 4790 states and 7160 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:39,662 INFO L93 Difference]: Finished difference Result 10035 states and 15022 transitions. [2021-12-21 10:24:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 387 [2021-12-21 10:24:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:39,719 INFO L225 Difference]: With dead ends: 10035 [2021-12-21 10:24:39,720 INFO L226 Difference]: Without dead ends: 5268 [2021-12-21 10:24:39,726 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 [2021-12-21 10:24:39,728 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:39,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 377 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-21 10:24:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2021-12-21 10:24:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.496487564078223) internal successors, (7882), 5267 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 7882 transitions. [2021-12-21 10:24:39,858 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 7882 transitions. Word has length 387 [2021-12-21 10:24:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:39,859 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 7882 transitions. [2021-12-21 10:24:39,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 7882 transitions. [2021-12-21 10:24:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-21 10:24:39,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:39,871 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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] [2021-12-21 10:24:39,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 10:24:39,871 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash -477358949, now seen corresponding path program 1 times [2021-12-21 10:24:39,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:39,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807741334] [2021-12-21 10:24:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:39,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-12-21 10:24:40,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807741334] [2021-12-21 10:24:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807741334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:40,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:40,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:40,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863625975] [2021-12-21 10:24:40,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:40,073 INFO L87 Difference]: Start difference. First operand 5268 states and 7882 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:40,240 INFO L93 Difference]: Finished difference Result 10985 states and 16457 transitions. [2021-12-21 10:24:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 394 [2021-12-21 10:24:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:40,253 INFO L225 Difference]: With dead ends: 10985 [2021-12-21 10:24:40,253 INFO L226 Difference]: Without dead ends: 5740 [2021-12-21 10:24:40,259 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 [2021-12-21 10:24:40,260 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:40,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2021-12-21 10:24:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5740. [2021-12-21 10:24:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5739 states have (on average 1.4959052099668932) internal successors, (8585), 5739 states have internal predecessors, (8585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 8585 transitions. [2021-12-21 10:24:40,368 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 8585 transitions. Word has length 394 [2021-12-21 10:24:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:40,370 INFO L470 AbstractCegarLoop]: Abstraction has 5740 states and 8585 transitions. [2021-12-21 10:24:40,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 8585 transitions. [2021-12-21 10:24:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-21 10:24:40,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:40,381 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:40,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-21 10:24:40,381 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1914583371, now seen corresponding path program 1 times [2021-12-21 10:24:40,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:40,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956000730] [2021-12-21 10:24:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:40,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-12-21 10:24:40,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:40,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956000730] [2021-12-21 10:24:40,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956000730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:40,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:40,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:40,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383372122] [2021-12-21 10:24:40,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:40,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:40,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:40,634 INFO L87 Difference]: Start difference. First operand 5740 states and 8585 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:40,782 INFO L93 Difference]: Finished difference Result 11935 states and 17872 transitions. [2021-12-21 10:24:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 470 [2021-12-21 10:24:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:40,796 INFO L225 Difference]: With dead ends: 11935 [2021-12-21 10:24:40,797 INFO L226 Difference]: Without dead ends: 6218 [2021-12-21 10:24:40,803 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 [2021-12-21 10:24:40,804 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:40,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 375 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2021-12-21 10:24:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 6218. [2021-12-21 10:24:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6217 states have (on average 1.4973459868103587) internal successors, (9309), 6217 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 9309 transitions. [2021-12-21 10:24:40,989 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 9309 transitions. Word has length 470 [2021-12-21 10:24:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:40,990 INFO L470 AbstractCegarLoop]: Abstraction has 6218 states and 9309 transitions. [2021-12-21 10:24:40,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 9309 transitions. [2021-12-21 10:24:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-12-21 10:24:41,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:41,003 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 6, 3, 3, 3, 3, 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] [2021-12-21 10:24:41,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-21 10:24:41,004 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2096433782, now seen corresponding path program 1 times [2021-12-21 10:24:41,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:41,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312762059] [2021-12-21 10:24:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:41,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 744 proven. 7 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2021-12-21 10:24:41,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:41,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312762059] [2021-12-21 10:24:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312762059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:41,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332515906] [2021-12-21 10:24:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:41,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:24:41,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:24:41,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:24:41,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:24:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 2353 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:24:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:24:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2021-12-21 10:24:43,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:24:43,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332515906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:43,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:24:43,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 10:24:43,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627904910] [2021-12-21 10:24:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:43,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:43,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:24:43,169 INFO L87 Difference]: Start difference. First operand 6218 states and 9309 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:43,330 INFO L93 Difference]: Finished difference Result 12891 states and 19320 transitions. [2021-12-21 10:24:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 512 [2021-12-21 10:24:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:43,345 INFO L225 Difference]: With dead ends: 12891 [2021-12-21 10:24:43,345 INFO L226 Difference]: Without dead ends: 6696 [2021-12-21 10:24:43,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:24:43,353 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:43,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 374 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6696 states. [2021-12-21 10:24:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6696 to 6696. [2021-12-21 10:24:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6696 states, 6695 states have (on average 1.4987303958177745) internal successors, (10034), 6695 states have internal predecessors, (10034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6696 states to 6696 states and 10034 transitions. [2021-12-21 10:24:43,524 INFO L78 Accepts]: Start accepts. Automaton has 6696 states and 10034 transitions. Word has length 512 [2021-12-21 10:24:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:43,525 INFO L470 AbstractCegarLoop]: Abstraction has 6696 states and 10034 transitions. [2021-12-21 10:24:43,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6696 states and 10034 transitions. [2021-12-21 10:24:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-21 10:24:43,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:43,541 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:43,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:24:43,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-21 10:24:43,763 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2030741037, now seen corresponding path program 1 times [2021-12-21 10:24:43,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:43,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199600303] [2021-12-21 10:24:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:43,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-12-21 10:24:44,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199600303] [2021-12-21 10:24:44,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199600303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:44,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:44,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:44,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795750409] [2021-12-21 10:24:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:44,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:44,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:44,082 INFO L87 Difference]: Start difference. First operand 6696 states and 10034 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:45,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:46,236 INFO L93 Difference]: Finished difference Result 14544 states and 21738 transitions. [2021-12-21 10:24:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 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 520 [2021-12-21 10:24:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:46,251 INFO L225 Difference]: With dead ends: 14544 [2021-12-21 10:24:46,251 INFO L226 Difference]: Without dead ends: 7871 [2021-12-21 10:24:46,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:46,260 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 73 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:46,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 703 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 10:24:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-12-21 10:24:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7270. [2021-12-21 10:24:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 1.4997936442426745) internal successors, (10902), 7269 states have internal predecessors, (10902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 10902 transitions. [2021-12-21 10:24:46,409 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 10902 transitions. Word has length 520 [2021-12-21 10:24:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:46,409 INFO L470 AbstractCegarLoop]: Abstraction has 7270 states and 10902 transitions. [2021-12-21 10:24:46,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 10902 transitions. [2021-12-21 10:24:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-21 10:24:46,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:46,420 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-21 10:24:46,421 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1407400015, now seen corresponding path program 1 times [2021-12-21 10:24:46,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:46,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49013310] [2021-12-21 10:24:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:46,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2021-12-21 10:24:46,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49013310] [2021-12-21 10:24:46,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49013310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:46,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:46,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:46,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514772268] [2021-12-21 10:24:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:46,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:46,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:46,668 INFO L87 Difference]: Start difference. First operand 7270 states and 10902 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:46,860 INFO L93 Difference]: Finished difference Result 15031 states and 22561 transitions. [2021-12-21 10:24:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:46,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 520 [2021-12-21 10:24:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:46,871 INFO L225 Difference]: With dead ends: 15031 [2021-12-21 10:24:46,872 INFO L226 Difference]: Without dead ends: 7784 [2021-12-21 10:24:46,877 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 [2021-12-21 10:24:46,878 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:46,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7784 states. [2021-12-21 10:24:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7784 to 7784. [2021-12-21 10:24:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 1.4991648464602338) internal successors, (11668), 7783 states have internal predecessors, (11668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 11668 transitions. [2021-12-21 10:24:47,028 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 11668 transitions. Word has length 520 [2021-12-21 10:24:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:47,029 INFO L470 AbstractCegarLoop]: Abstraction has 7784 states and 11668 transitions. [2021-12-21 10:24:47,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 11668 transitions. [2021-12-21 10:24:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2021-12-21 10:24:47,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:47,040 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:24:47,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 10:24:47,041 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash -876039620, now seen corresponding path program 1 times [2021-12-21 10:24:47,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:47,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511725847] [2021-12-21 10:24:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:47,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 849 proven. 0 refuted. 0 times theorem prover too weak. 2561 trivial. 0 not checked. [2021-12-21 10:24:47,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511725847] [2021-12-21 10:24:47,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511725847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:47,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:47,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:24:47,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236943645] [2021-12-21 10:24:47,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:47,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:24:47,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:47,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:24:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:24:47,322 INFO L87 Difference]: Start difference. First operand 7784 states and 11668 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:47,486 INFO L93 Difference]: Finished difference Result 16064 states and 24100 transitions. [2021-12-21 10:24:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:24:47,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 597 [2021-12-21 10:24:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:47,498 INFO L225 Difference]: With dead ends: 16064 [2021-12-21 10:24:47,498 INFO L226 Difference]: Without dead ends: 8303 [2021-12-21 10:24:47,506 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 [2021-12-21 10:24:47,507 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:47,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 372 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:24:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8303 states. [2021-12-21 10:24:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8303 to 8303. [2021-12-21 10:24:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8303 states, 8302 states have (on average 1.5004818116116598) internal successors, (12457), 8302 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8303 states to 8303 states and 12457 transitions. [2021-12-21 10:24:47,733 INFO L78 Accepts]: Start accepts. Automaton has 8303 states and 12457 transitions. Word has length 597 [2021-12-21 10:24:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:47,733 INFO L470 AbstractCegarLoop]: Abstraction has 8303 states and 12457 transitions. [2021-12-21 10:24:47,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 8303 states and 12457 transitions. [2021-12-21 10:24:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-21 10:24:47,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:47,746 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:24:47,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 10:24:47,746 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1729200158, now seen corresponding path program 1 times [2021-12-21 10:24:47,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:47,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316726587] [2021-12-21 10:24:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:47,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat