./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.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.13.i.cil-1.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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:23:13,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:23:13,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:23:13,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:23:13,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:23:13,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:23:13,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:23:13,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:23:13,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:23:13,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:23:13,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:23:13,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:23:13,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:23:13,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:23:13,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:23:13,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:23:13,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:23:13,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:23:13,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:23:13,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:23:13,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:23:13,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:23:13,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:23:13,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:23:13,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:23:13,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:23:13,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:23:13,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:23:13,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:23:13,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:23:13,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:23:13,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:23:13,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:23:13,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:23:13,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:23:13,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:23:13,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:23:13,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:23:13,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:23:13,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:23:13,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:23:13,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:23:13,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:23:13,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:23:13,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:23:13,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:23:13,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:23:13,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:23:13,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:23:13,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:23:13,168 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:23:13,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:23:13,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:23:13,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:23:13,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:23:13,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:23:13,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:23:13,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:23:13,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:23:13,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:23:13,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:23:13,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:23:13,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:23:13,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:23:13,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:23:13,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:23:13,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:23:13,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:23:13,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:23:13,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:23:13,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:23:13,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:23:13,172 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:23:13,172 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:23:13,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:23:13,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:23:13,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-12-21 10:23:13,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:23:13,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:23:13,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:23:13,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:23:13,356 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:23:13,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-12-21 10:23:13,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a753d6cd1/22f1b1a5aa9042c887cac6e9c705a0fe/FLAG11b2536ec [2021-12-21 10:23:13,784 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:23:13,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-12-21 10:23:13,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a753d6cd1/22f1b1a5aa9042c887cac6e9c705a0fe/FLAG11b2536ec [2021-12-21 10:23:14,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a753d6cd1/22f1b1a5aa9042c887cac6e9c705a0fe [2021-12-21 10:23:14,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:23:14,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:23:14,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:23:14,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:23:14,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:23:14,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572ad032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14, skipping insertion in model container [2021-12-21 10:23:14,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:23:14,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:23:14,548 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.13.i.cil-1.c[74354,74367] [2021-12-21 10:23:14,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:23:14,568 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:23:14,671 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.13.i.cil-1.c[74354,74367] [2021-12-21 10:23:14,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:23:14,685 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:23:14,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14 WrapperNode [2021-12-21 10:23:14,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:23:14,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:23:14,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:23:14,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:23:14,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,767 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-12-21 10:23:14,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:23:14,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:23:14,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:23:14,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:23:14,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:23:14,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:23:14,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:23:14,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:23:14,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (1/1) ... [2021-12-21 10:23:14,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:23:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:23:14,897 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 10:23:14,901 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 10:23:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:23:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:23:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:23:15,055 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:23:15,057 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:23:15,067 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:23:16,895 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-21 10:23:16,896 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-21 10:23:16,896 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:23:16,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:23:16,904 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:23:16,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:23:16 BoogieIcfgContainer [2021-12-21 10:23:16,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:23:16,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:23:16,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:23:16,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:23:16,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:23:14" (1/3) ... [2021-12-21 10:23:16,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5605d13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:23:16, skipping insertion in model container [2021-12-21 10:23:16,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:14" (2/3) ... [2021-12-21 10:23:16,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5605d13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:23:16, skipping insertion in model container [2021-12-21 10:23:16,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:23:16" (3/3) ... [2021-12-21 10:23:16,914 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2021-12-21 10:23:16,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:23:16,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:23:16,946 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:23:16,950 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 10:23:16,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:23:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 10:23:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:23:16,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:16,967 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] [2021-12-21 10:23:16,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-12-21 10:23:16,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10528797] [2021-12-21 10:23:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:16,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:17,275 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 10:23:17,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10528797] [2021-12-21 10:23:17,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10528797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:17,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:17,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:17,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131780369] [2021-12-21 10:23:17,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:17,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:17,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:17,306 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 10:23:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:18,090 INFO L93 Difference]: Finished difference Result 421 states and 717 transitions. [2021-12-21 10:23:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 10:23:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:18,100 INFO L225 Difference]: With dead ends: 421 [2021-12-21 10:23:18,100 INFO L226 Difference]: Without dead ends: 256 [2021-12-21 10:23:18,103 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 10:23:18,106 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 169 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:18,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 439 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:23:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-21 10:23:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2021-12-21 10:23:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5853658536585367) internal successors, (260), 164 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 10:23:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 260 transitions. [2021-12-21 10:23:18,140 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 260 transitions. Word has length 37 [2021-12-21 10:23:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:18,140 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 260 transitions. [2021-12-21 10:23:18,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 10:23:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 260 transitions. [2021-12-21 10:23:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 10:23:18,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:18,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:18,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:23:18,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1559591931, now seen corresponding path program 1 times [2021-12-21 10:23:18,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651541711] [2021-12-21 10:23:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:18,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:18,285 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 10:23:18,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:18,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651541711] [2021-12-21 10:23:18,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651541711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:18,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:18,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:18,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942799221] [2021-12-21 10:23:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:18,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:18,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:18,290 INFO L87 Difference]: Start difference. First operand 165 states and 260 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:19,055 INFO L93 Difference]: Finished difference Result 439 states and 692 transitions. [2021-12-21 10:23:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-21 10:23:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:19,057 INFO L225 Difference]: With dead ends: 439 [2021-12-21 10:23:19,057 INFO L226 Difference]: Without dead ends: 284 [2021-12-21 10:23:19,058 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 10:23:19,058 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 134 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:19,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:23:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-21 10:23:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2021-12-21 10:23:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.616580310880829) internal successors, (312), 193 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 10:23:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 312 transitions. [2021-12-21 10:23:19,072 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 312 transitions. Word has length 38 [2021-12-21 10:23:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:19,072 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 312 transitions. [2021-12-21 10:23:19,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 312 transitions. [2021-12-21 10:23:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:23:19,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:19,073 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] [2021-12-21 10:23:19,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:23:19,073 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1692183670, now seen corresponding path program 1 times [2021-12-21 10:23:19,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:19,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837794356] [2021-12-21 10:23:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:19,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:19,219 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 10:23:19,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837794356] [2021-12-21 10:23:19,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837794356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:19,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:19,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:19,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666774899] [2021-12-21 10:23:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:19,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:19,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:19,222 INFO L87 Difference]: Start difference. First operand 194 states and 312 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 10:23:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:19,762 INFO L93 Difference]: Finished difference Result 406 states and 651 transitions. [2021-12-21 10:23:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-21 10:23:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:19,764 INFO L225 Difference]: With dead ends: 406 [2021-12-21 10:23:19,764 INFO L226 Difference]: Without dead ends: 222 [2021-12-21 10:23:19,764 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 10:23:19,765 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 22 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 469 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 10:23:19,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 469 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-21 10:23:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 205. [2021-12-21 10:23:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6225490196078431) internal successors, (331), 204 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 10:23:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 331 transitions. [2021-12-21 10:23:19,773 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 331 transitions. Word has length 43 [2021-12-21 10:23:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:19,773 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 331 transitions. [2021-12-21 10:23:19,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 10:23:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 331 transitions. [2021-12-21 10:23:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:23:19,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:19,775 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] [2021-12-21 10:23:19,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:23:19,775 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1829148865, now seen corresponding path program 1 times [2021-12-21 10:23:19,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072939552] [2021-12-21 10:23:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:19,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:19,917 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 10:23:19,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:19,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072939552] [2021-12-21 10:23:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072939552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:19,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:19,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:19,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795691063] [2021-12-21 10:23:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:19,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:19,920 INFO L87 Difference]: Start difference. First operand 205 states and 331 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 10:23:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:20,437 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2021-12-21 10:23:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-21 10:23:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:20,439 INFO L225 Difference]: With dead ends: 406 [2021-12-21 10:23:20,439 INFO L226 Difference]: Without dead ends: 222 [2021-12-21 10:23:20,440 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 10:23:20,440 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:20,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-21 10:23:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 205. [2021-12-21 10:23:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6176470588235294) internal successors, (330), 204 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 10:23:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 330 transitions. [2021-12-21 10:23:20,447 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 330 transitions. Word has length 56 [2021-12-21 10:23:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:20,447 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 330 transitions. [2021-12-21 10:23:20,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 10:23:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 330 transitions. [2021-12-21 10:23:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:23:20,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:20,449 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] [2021-12-21 10:23:20,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:23:20,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1641822446, now seen corresponding path program 1 times [2021-12-21 10:23:20,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:20,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38492565] [2021-12-21 10:23:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:20,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:20,574 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 10:23:20,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:20,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38492565] [2021-12-21 10:23:20,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38492565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:20,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:20,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:20,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527706568] [2021-12-21 10:23:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:20,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:20,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:20,577 INFO L87 Difference]: Start difference. First operand 205 states and 330 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:21,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:21,019 INFO L93 Difference]: Finished difference Result 405 states and 648 transitions. [2021-12-21 10:23:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:21,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-21 10:23:21,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:21,021 INFO L225 Difference]: With dead ends: 405 [2021-12-21 10:23:21,021 INFO L226 Difference]: Without dead ends: 221 [2021-12-21 10:23:21,021 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 10:23:21,022 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:21,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:23:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-21 10:23:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2021-12-21 10:23:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6127450980392157) internal successors, (329), 204 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 10:23:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 329 transitions. [2021-12-21 10:23:21,027 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 329 transitions. Word has length 57 [2021-12-21 10:23:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:21,027 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 329 transitions. [2021-12-21 10:23:21,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 329 transitions. [2021-12-21 10:23:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:23:21,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:21,028 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] [2021-12-21 10:23:21,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:23:21,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1649522854, now seen corresponding path program 1 times [2021-12-21 10:23:21,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943012181] [2021-12-21 10:23:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:21,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:21,140 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 10:23:21,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:21,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943012181] [2021-12-21 10:23:21,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943012181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:21,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:21,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:21,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230344719] [2021-12-21 10:23:21,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:21,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:21,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:21,143 INFO L87 Difference]: Start difference. First operand 205 states and 329 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:21,629 INFO L93 Difference]: Finished difference Result 479 states and 760 transitions. [2021-12-21 10:23:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:21,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-21 10:23:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:21,631 INFO L225 Difference]: With dead ends: 479 [2021-12-21 10:23:21,631 INFO L226 Difference]: Without dead ends: 295 [2021-12-21 10:23:21,632 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 10:23:21,632 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 150 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:21,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-21 10:23:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 205. [2021-12-21 10:23:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5980392156862746) internal successors, (326), 204 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 10:23:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 326 transitions. [2021-12-21 10:23:21,637 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 326 transitions. Word has length 57 [2021-12-21 10:23:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:21,637 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 326 transitions. [2021-12-21 10:23:21,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 326 transitions. [2021-12-21 10:23:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:23:21,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:21,638 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] [2021-12-21 10:23:21,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:23:21,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash 781598013, now seen corresponding path program 1 times [2021-12-21 10:23:21,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:21,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677372974] [2021-12-21 10:23:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:21,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:21,748 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 10:23:21,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:21,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677372974] [2021-12-21 10:23:21,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677372974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:21,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:21,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:21,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219225698] [2021-12-21 10:23:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:21,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:21,751 INFO L87 Difference]: Start difference. First operand 205 states and 326 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:22,473 INFO L93 Difference]: Finished difference Result 478 states and 754 transitions. [2021-12-21 10:23:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-21 10:23:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:22,474 INFO L225 Difference]: With dead ends: 478 [2021-12-21 10:23:22,474 INFO L226 Difference]: Without dead ends: 294 [2021-12-21 10:23:22,475 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 10:23:22,475 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 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 10:23:22,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:23:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-21 10:23:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2021-12-21 10:23:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5833333333333333) internal successors, (323), 204 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 10:23:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2021-12-21 10:23:22,493 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 57 [2021-12-21 10:23:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:22,494 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2021-12-21 10:23:22,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2021-12-21 10:23:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:23:22,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:22,496 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] [2021-12-21 10:23:22,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:23:22,496 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1516942845, now seen corresponding path program 1 times [2021-12-21 10:23:22,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:22,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239353104] [2021-12-21 10:23:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:22,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:22,588 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 10:23:22,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239353104] [2021-12-21 10:23:22,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239353104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:22,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:22,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:22,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975966315] [2021-12-21 10:23:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:22,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:22,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:22,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:22,590 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:23,079 INFO L93 Difference]: Finished difference Result 478 states and 749 transitions. [2021-12-21 10:23:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-21 10:23:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:23,081 INFO L225 Difference]: With dead ends: 478 [2021-12-21 10:23:23,081 INFO L226 Difference]: Without dead ends: 294 [2021-12-21 10:23:23,081 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 10:23:23,082 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-21 10:23:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2021-12-21 10:23:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5686274509803921) internal successors, (320), 204 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 10:23:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 320 transitions. [2021-12-21 10:23:23,086 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 320 transitions. Word has length 57 [2021-12-21 10:23:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:23,086 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 320 transitions. [2021-12-21 10:23:23,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 10:23:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 320 transitions. [2021-12-21 10:23:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:23:23,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:23,087 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] [2021-12-21 10:23:23,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:23:23,087 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash -193910358, now seen corresponding path program 1 times [2021-12-21 10:23:23,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:23,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760529698] [2021-12-21 10:23:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:23,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:23,161 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 10:23:23,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:23,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760529698] [2021-12-21 10:23:23,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760529698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:23,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:23,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:23,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947306354] [2021-12-21 10:23:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:23,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:23,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:23,164 INFO L87 Difference]: Start difference. First operand 205 states and 320 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 10:23:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:23,880 INFO L93 Difference]: Finished difference Result 478 states and 744 transitions. [2021-12-21 10:23:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:23,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-21 10:23:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:23,882 INFO L225 Difference]: With dead ends: 478 [2021-12-21 10:23:23,882 INFO L226 Difference]: Without dead ends: 294 [2021-12-21 10:23:23,882 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 10:23:23,882 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 146 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 332 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 10:23:23,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:23:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-21 10:23:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2021-12-21 10:23:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.553921568627451) internal successors, (317), 204 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 10:23:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 317 transitions. [2021-12-21 10:23:23,886 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 317 transitions. Word has length 58 [2021-12-21 10:23:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:23,886 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 317 transitions. [2021-12-21 10:23:23,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 10:23:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 317 transitions. [2021-12-21 10:23:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 10:23:23,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:23,887 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] [2021-12-21 10:23:23,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:23:23,887 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1419532885, now seen corresponding path program 1 times [2021-12-21 10:23:23,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:23,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339708300] [2021-12-21 10:23:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:23,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:23,983 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 10:23:23,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:23,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339708300] [2021-12-21 10:23:23,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339708300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:23,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:23,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:23,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953757234] [2021-12-21 10:23:23,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:23,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:23,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:23,985 INFO L87 Difference]: Start difference. First operand 205 states and 317 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 10:23:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:24,393 INFO L93 Difference]: Finished difference Result 402 states and 624 transitions. [2021-12-21 10:23:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:24,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-21 10:23:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:24,395 INFO L225 Difference]: With dead ends: 402 [2021-12-21 10:23:24,395 INFO L226 Difference]: Without dead ends: 218 [2021-12-21 10:23:24,395 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 10:23:24,396 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 20 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:24,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 479 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:23:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-21 10:23:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2021-12-21 10:23:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5490196078431373) internal successors, (316), 204 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 10:23:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 316 transitions. [2021-12-21 10:23:24,400 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 316 transitions. Word has length 59 [2021-12-21 10:23:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:24,400 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 316 transitions. [2021-12-21 10:23:24,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 10:23:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 316 transitions. [2021-12-21 10:23:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:23:24,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:24,400 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] [2021-12-21 10:23:24,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:23:24,401 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:24,401 INFO L85 PathProgramCache]: Analyzing trace with hash -672893361, now seen corresponding path program 1 times [2021-12-21 10:23:24,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:24,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020810733] [2021-12-21 10:23:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:24,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:24,484 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 10:23:24,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020810733] [2021-12-21 10:23:24,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020810733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:24,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:24,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:24,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435216131] [2021-12-21 10:23:24,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:24,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:24,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:24,486 INFO L87 Difference]: Start difference. First operand 205 states and 316 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 10:23:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:25,339 INFO L93 Difference]: Finished difference Result 478 states and 738 transitions. [2021-12-21 10:23:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:25,339 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 10:23:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:25,340 INFO L225 Difference]: With dead ends: 478 [2021-12-21 10:23:25,340 INFO L226 Difference]: Without dead ends: 294 [2021-12-21 10:23:25,341 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 10:23:25,341 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 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 10:23:25,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:23:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-21 10:23:25,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2021-12-21 10:23:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5343137254901962) internal successors, (313), 204 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 10:23:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 313 transitions. [2021-12-21 10:23:25,345 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 313 transitions. Word has length 60 [2021-12-21 10:23:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:25,345 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 313 transitions. [2021-12-21 10:23:25,345 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 10:23:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 313 transitions. [2021-12-21 10:23:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:23:25,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:25,347 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] [2021-12-21 10:23:25,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:23:25,348 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 457194935, now seen corresponding path program 1 times [2021-12-21 10:23:25,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:25,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388820268] [2021-12-21 10:23:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:25,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:25,423 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 10:23:25,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388820268] [2021-12-21 10:23:25,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388820268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:25,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:25,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:25,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937522254] [2021-12-21 10:23:25,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:25,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:25,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:25,425 INFO L87 Difference]: Start difference. First operand 205 states and 313 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 10:23:26,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:23:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:26,939 INFO L93 Difference]: Finished difference Result 508 states and 780 transitions. [2021-12-21 10:23:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:26,939 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 10:23:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:26,940 INFO L225 Difference]: With dead ends: 508 [2021-12-21 10:23:26,940 INFO L226 Difference]: Without dead ends: 324 [2021-12-21 10:23:26,941 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 10:23:26,941 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 119 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:26,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 10:23:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-21 10:23:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 245. [2021-12-21 10:23:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5532786885245902) internal successors, (379), 244 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 10:23:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 379 transitions. [2021-12-21 10:23:26,947 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 379 transitions. Word has length 60 [2021-12-21 10:23:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:26,947 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 379 transitions. [2021-12-21 10:23:26,947 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 10:23:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 379 transitions. [2021-12-21 10:23:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:23:26,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:26,948 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] [2021-12-21 10:23:26,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:23:26,948 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1280776532, now seen corresponding path program 1 times [2021-12-21 10:23:26,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:26,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49250741] [2021-12-21 10:23:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:26,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:27,059 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 10:23:27,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:27,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49250741] [2021-12-21 10:23:27,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49250741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:27,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:27,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:27,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383320144] [2021-12-21 10:23:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:27,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:27,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:27,061 INFO L87 Difference]: Start difference. First operand 245 states and 379 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 10:23:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:27,778 INFO L93 Difference]: Finished difference Result 511 states and 793 transitions. [2021-12-21 10:23:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:27,779 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 10:23:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:27,780 INFO L225 Difference]: With dead ends: 511 [2021-12-21 10:23:27,780 INFO L226 Difference]: Without dead ends: 287 [2021-12-21 10:23:27,780 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 10:23:27,781 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 29 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:27,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 493 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:23:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-21 10:23:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 267. [2021-12-21 10:23:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5488721804511278) internal successors, (412), 266 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 10:23:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 412 transitions. [2021-12-21 10:23:27,785 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 412 transitions. Word has length 61 [2021-12-21 10:23:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:27,786 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 412 transitions. [2021-12-21 10:23:27,786 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 10:23:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 412 transitions. [2021-12-21 10:23:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 10:23:27,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:27,786 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:23:27,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:23:27,786 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1738282229, now seen corresponding path program 1 times [2021-12-21 10:23:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:27,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021282264] [2021-12-21 10:23:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:27,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:23:27,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:27,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021282264] [2021-12-21 10:23:27,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021282264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:27,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:27,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218850102] [2021-12-21 10:23:27,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:27,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:27,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:27,919 INFO L87 Difference]: Start difference. First operand 267 states and 412 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 10:23:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:28,539 INFO L93 Difference]: Finished difference Result 531 states and 823 transitions. [2021-12-21 10:23:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-21 10:23:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:28,541 INFO L225 Difference]: With dead ends: 531 [2021-12-21 10:23:28,541 INFO L226 Difference]: Without dead ends: 285 [2021-12-21 10:23:28,541 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 10:23:28,542 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 34 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:28,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:23:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-21 10:23:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 267. [2021-12-21 10:23:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5451127819548873) internal successors, (411), 266 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 10:23:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 411 transitions. [2021-12-21 10:23:28,547 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 411 transitions. Word has length 74 [2021-12-21 10:23:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:28,547 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 411 transitions. [2021-12-21 10:23:28,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 10:23:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 411 transitions. [2021-12-21 10:23:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 10:23:28,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:28,550 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:23:28,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:23:28,550 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1641439224, now seen corresponding path program 1 times [2021-12-21 10:23:28,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:28,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8071346] [2021-12-21 10:23:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:28,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:23:28,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8071346] [2021-12-21 10:23:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8071346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:28,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:28,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234204817] [2021-12-21 10:23:28,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:28,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:28,631 INFO L87 Difference]: Start difference. First operand 267 states and 411 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 10:23:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:29,070 INFO L93 Difference]: Finished difference Result 530 states and 820 transitions. [2021-12-21 10:23:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-12-21 10:23:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:29,072 INFO L225 Difference]: With dead ends: 530 [2021-12-21 10:23:29,072 INFO L226 Difference]: Without dead ends: 284 [2021-12-21 10:23:29,073 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 10:23:29,073 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 38 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 499 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 10:23:29,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:23:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-21 10:23:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 267. [2021-12-21 10:23:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5413533834586466) internal successors, (410), 266 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 10:23:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 410 transitions. [2021-12-21 10:23:29,077 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 410 transitions. Word has length 75 [2021-12-21 10:23:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:29,078 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 410 transitions. [2021-12-21 10:23:29,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 10:23:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 410 transitions. [2021-12-21 10:23:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 10:23:29,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:29,078 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] [2021-12-21 10:23:29,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:23:29,078 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash -960780097, now seen corresponding path program 1 times [2021-12-21 10:23:29,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:29,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180000211] [2021-12-21 10:23:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:29,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:29,157 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 10:23:29,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180000211] [2021-12-21 10:23:29,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180000211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:29,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:29,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:29,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424225711] [2021-12-21 10:23:29,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:29,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:29,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:29,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:29,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:29,160 INFO L87 Difference]: Start difference. First operand 267 states and 410 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 10:23:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:29,700 INFO L93 Difference]: Finished difference Result 602 states and 927 transitions. [2021-12-21 10:23:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-21 10:23:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:29,702 INFO L225 Difference]: With dead ends: 602 [2021-12-21 10:23:29,702 INFO L226 Difference]: Without dead ends: 356 [2021-12-21 10:23:29,702 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 10:23:29,703 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 144 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:29,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 334 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-21 10:23:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 267. [2021-12-21 10:23:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5263157894736843) internal successors, (406), 266 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 10:23:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 406 transitions. [2021-12-21 10:23:29,708 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 406 transitions. Word has length 77 [2021-12-21 10:23:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:29,708 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 406 transitions. [2021-12-21 10:23:29,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 10:23:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 406 transitions. [2021-12-21 10:23:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 10:23:29,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:29,709 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] [2021-12-21 10:23:29,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:23:29,709 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 233723934, now seen corresponding path program 1 times [2021-12-21 10:23:29,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808633298] [2021-12-21 10:23:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:29,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:29,778 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 10:23:29,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808633298] [2021-12-21 10:23:29,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808633298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:29,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:29,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:29,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373324557] [2021-12-21 10:23:29,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:29,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:29,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:29,780 INFO L87 Difference]: Start difference. First operand 267 states and 406 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 10:23:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:30,459 INFO L93 Difference]: Finished difference Result 605 states and 922 transitions. [2021-12-21 10:23:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-21 10:23:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:30,461 INFO L225 Difference]: With dead ends: 605 [2021-12-21 10:23:30,461 INFO L226 Difference]: Without dead ends: 359 [2021-12-21 10:23:30,462 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 10:23:30,462 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 71 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:30,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 469 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:23:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-21 10:23:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 309. [2021-12-21 10:23:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5357142857142858) internal successors, (473), 308 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 10:23:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 473 transitions. [2021-12-21 10:23:30,467 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 473 transitions. Word has length 83 [2021-12-21 10:23:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:30,468 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 473 transitions. [2021-12-21 10:23:30,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 10:23:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 473 transitions. [2021-12-21 10:23:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 10:23:30,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:30,468 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] [2021-12-21 10:23:30,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:23:30,469 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1138083364, now seen corresponding path program 1 times [2021-12-21 10:23:30,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:30,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287489090] [2021-12-21 10:23:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:30,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:30,562 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 10:23:30,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:30,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287489090] [2021-12-21 10:23:30,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287489090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:30,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:30,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:30,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064480121] [2021-12-21 10:23:30,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:30,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:30,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:30,564 INFO L87 Difference]: Start difference. First operand 309 states and 473 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 10:23:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:31,056 INFO L93 Difference]: Finished difference Result 646 states and 991 transitions. [2021-12-21 10:23:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-21 10:23:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:31,058 INFO L225 Difference]: With dead ends: 646 [2021-12-21 10:23:31,058 INFO L226 Difference]: Without dead ends: 358 [2021-12-21 10:23:31,058 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 10:23:31,059 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 36 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:31,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 591 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-21 10:23:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 333. [2021-12-21 10:23:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.533132530120482) internal successors, (509), 332 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 10:23:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 509 transitions. [2021-12-21 10:23:31,064 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 509 transitions. Word has length 83 [2021-12-21 10:23:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:31,064 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 509 transitions. [2021-12-21 10:23:31,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 10:23:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 509 transitions. [2021-12-21 10:23:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 10:23:31,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:31,065 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 10:23:31,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:23:31,065 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1409451137, now seen corresponding path program 1 times [2021-12-21 10:23:31,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:31,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915800017] [2021-12-21 10:23:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:31,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:23:31,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915800017] [2021-12-21 10:23:31,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915800017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:31,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:31,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:31,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138552696] [2021-12-21 10:23:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:31,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:31,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:31,147 INFO L87 Difference]: Start difference. First operand 333 states and 509 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 10:23:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:32,172 INFO L93 Difference]: Finished difference Result 771 states and 1187 transitions. [2021-12-21 10:23:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 96 [2021-12-21 10:23:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:32,174 INFO L225 Difference]: With dead ends: 771 [2021-12-21 10:23:32,174 INFO L226 Difference]: Without dead ends: 459 [2021-12-21 10:23:32,175 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 10:23:32,175 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 141 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:32,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 354 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 10:23:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-21 10:23:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 349. [2021-12-21 10:23:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.514367816091954) internal successors, (527), 348 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 10:23:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 527 transitions. [2021-12-21 10:23:32,181 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 527 transitions. Word has length 96 [2021-12-21 10:23:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:32,181 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 527 transitions. [2021-12-21 10:23:32,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 10:23:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 527 transitions. [2021-12-21 10:23:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 10:23:32,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:32,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:23:32,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:23:32,182 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:32,182 INFO L85 PathProgramCache]: Analyzing trace with hash 436925762, now seen corresponding path program 1 times [2021-12-21 10:23:32,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:32,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889835550] [2021-12-21 10:23:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:32,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:23:32,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889835550] [2021-12-21 10:23:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889835550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:32,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:32,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:32,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301210910] [2021-12-21 10:23:32,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:32,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:32,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:32,254 INFO L87 Difference]: Start difference. First operand 349 states and 527 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:33,200 INFO L93 Difference]: Finished difference Result 755 states and 1147 transitions. [2021-12-21 10:23:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:33,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-21 10:23:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:33,202 INFO L225 Difference]: With dead ends: 755 [2021-12-21 10:23:33,202 INFO L226 Difference]: Without dead ends: 427 [2021-12-21 10:23:33,203 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 10:23:33,203 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 139 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:33,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 356 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:23:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-12-21 10:23:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 349. [2021-12-21 10:23:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4971264367816093) internal successors, (521), 348 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 10:23:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 521 transitions. [2021-12-21 10:23:33,208 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 521 transitions. Word has length 97 [2021-12-21 10:23:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:33,208 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 521 transitions. [2021-12-21 10:23:33,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 521 transitions. [2021-12-21 10:23:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 10:23:33,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:33,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:33,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:23:33,209 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:33,210 INFO L85 PathProgramCache]: Analyzing trace with hash 280390343, now seen corresponding path program 1 times [2021-12-21 10:23:33,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:33,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900468346] [2021-12-21 10:23:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:33,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:23:33,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900468346] [2021-12-21 10:23:33,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900468346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:33,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:33,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:33,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774870725] [2021-12-21 10:23:33,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:33,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:33,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:33,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:33,289 INFO L87 Difference]: Start difference. First operand 349 states and 521 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 10:23:34,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:23:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:34,513 INFO L93 Difference]: Finished difference Result 714 states and 1068 transitions. [2021-12-21 10:23:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:34,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 104 [2021-12-21 10:23:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:34,515 INFO L225 Difference]: With dead ends: 714 [2021-12-21 10:23:34,515 INFO L226 Difference]: Without dead ends: 386 [2021-12-21 10:23:34,515 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 10:23:34,516 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 75 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 489 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:23:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-21 10:23:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 349. [2021-12-21 10:23:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4942528735632183) internal successors, (520), 348 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 10:23:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 520 transitions. [2021-12-21 10:23:34,521 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 520 transitions. Word has length 104 [2021-12-21 10:23:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:34,521 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 520 transitions. [2021-12-21 10:23:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 10:23:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 520 transitions. [2021-12-21 10:23:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:23:34,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:34,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:34,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:23:34,522 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 318897402, now seen corresponding path program 1 times [2021-12-21 10:23:34,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:34,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729147699] [2021-12-21 10:23:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:34,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:23:34,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729147699] [2021-12-21 10:23:34,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729147699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:34,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:34,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:34,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021054062] [2021-12-21 10:23:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:34,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:34,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:34,595 INFO L87 Difference]: Start difference. First operand 349 states and 520 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 10:23:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:35,110 INFO L93 Difference]: Finished difference Result 714 states and 1066 transitions. [2021-12-21 10:23:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 105 [2021-12-21 10:23:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:35,112 INFO L225 Difference]: With dead ends: 714 [2021-12-21 10:23:35,112 INFO L226 Difference]: Without dead ends: 386 [2021-12-21 10:23:35,112 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 10:23:35,113 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 76 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:35,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 503 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:23:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-21 10:23:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 349. [2021-12-21 10:23:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4913793103448276) internal successors, (519), 348 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 10:23:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 519 transitions. [2021-12-21 10:23:35,118 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 519 transitions. Word has length 105 [2021-12-21 10:23:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 519 transitions. [2021-12-21 10:23:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 10:23:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 519 transitions. [2021-12-21 10:23:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:23:35,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:35,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:35,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:23:35,119 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 509759261, now seen corresponding path program 1 times [2021-12-21 10:23:35,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856941624] [2021-12-21 10:23:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:35,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:23:35,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856941624] [2021-12-21 10:23:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856941624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:35,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:35,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:35,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186190783] [2021-12-21 10:23:35,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:35,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:35,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:35,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:35,224 INFO L87 Difference]: Start difference. First operand 349 states and 519 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 10:23:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:35,852 INFO L93 Difference]: Finished difference Result 755 states and 1131 transitions. [2021-12-21 10:23:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 105 [2021-12-21 10:23:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:35,855 INFO L225 Difference]: With dead ends: 755 [2021-12-21 10:23:35,855 INFO L226 Difference]: Without dead ends: 427 [2021-12-21 10:23:35,855 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 10:23:35,855 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 122 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:35,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 392 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:23:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-12-21 10:23:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 349. [2021-12-21 10:23:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4798850574712643) internal successors, (515), 348 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 515 transitions. [2021-12-21 10:23:35,861 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 515 transitions. Word has length 105 [2021-12-21 10:23:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:35,861 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 515 transitions. [2021-12-21 10:23:35,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 10:23:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 515 transitions. [2021-12-21 10:23:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:23:35,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:35,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:35,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:23:35,862 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash -213108826, now seen corresponding path program 1 times [2021-12-21 10:23:35,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:35,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239611502] [2021-12-21 10:23:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:35,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:23:35,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239611502] [2021-12-21 10:23:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239611502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:35,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:35,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:35,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35779538] [2021-12-21 10:23:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:35,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:35,944 INFO L87 Difference]: Start difference. First operand 349 states and 515 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 10:23:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,132 INFO L93 Difference]: Finished difference Result 820 states and 1222 transitions. [2021-12-21 10:23:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 105 [2021-12-21 10:23:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,134 INFO L225 Difference]: With dead ends: 820 [2021-12-21 10:23:37,134 INFO L226 Difference]: Without dead ends: 492 [2021-12-21 10:23:37,135 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 10:23:37,135 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 115 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 366 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:23:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-21 10:23:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 413. [2021-12-21 10:23:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.4757281553398058) internal successors, (608), 412 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 10:23:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 608 transitions. [2021-12-21 10:23:37,142 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 608 transitions. Word has length 105 [2021-12-21 10:23:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,142 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 608 transitions. [2021-12-21 10:23:37,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 10:23:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 608 transitions. [2021-12-21 10:23:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:23:37,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:37,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:23:37,144 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash 998169656, now seen corresponding path program 1 times [2021-12-21 10:23:37,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547994354] [2021-12-21 10:23:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 10:23:37,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547994354] [2021-12-21 10:23:37,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547994354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:37,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:37,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:37,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111029367] [2021-12-21 10:23:37,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:37,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:37,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:37,230 INFO L87 Difference]: Start difference. First operand 413 states and 608 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 10:23:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,256 INFO L93 Difference]: Finished difference Result 1192 states and 1770 transitions. [2021-12-21 10:23:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:37,256 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 105 [2021-12-21 10:23:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,258 INFO L225 Difference]: With dead ends: 1192 [2021-12-21 10:23:37,259 INFO L226 Difference]: Without dead ends: 800 [2021-12-21 10:23:37,259 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 10:23:37,262 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 426 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-12-21 10:23:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 800. [2021-12-21 10:23:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.4730913642052565) internal successors, (1177), 799 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 10:23:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1177 transitions. [2021-12-21 10:23:37,278 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1177 transitions. Word has length 105 [2021-12-21 10:23:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,279 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1177 transitions. [2021-12-21 10:23:37,279 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 10:23:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1177 transitions. [2021-12-21 10:23:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:23:37,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:37,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 10:23:37,281 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash 943776758, now seen corresponding path program 1 times [2021-12-21 10:23:37,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737072653] [2021-12-21 10:23:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 10:23:37,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:37,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737072653] [2021-12-21 10:23:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737072653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:37,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:37,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:37,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130111258] [2021-12-21 10:23:37,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:37,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:37,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:37,343 INFO L87 Difference]: Start difference. First operand 800 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,364 INFO L93 Difference]: Finished difference Result 1606 states and 2366 transitions. [2021-12-21 10:23:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:37,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-21 10:23:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,366 INFO L225 Difference]: With dead ends: 1606 [2021-12-21 10:23:37,367 INFO L226 Difference]: Without dead ends: 827 [2021-12-21 10:23:37,367 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 10:23:37,368 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-21 10:23:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-21 10:23:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.4673123486682809) internal successors, (1212), 826 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 10:23:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1212 transitions. [2021-12-21 10:23:37,381 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1212 transitions. Word has length 105 [2021-12-21 10:23:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,381 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1212 transitions. [2021-12-21 10:23:37,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1212 transitions. [2021-12-21 10:23:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:23:37,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:37,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:23:37,383 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash -935354188, now seen corresponding path program 1 times [2021-12-21 10:23:37,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804488464] [2021-12-21 10:23:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-21 10:23:37,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804488464] [2021-12-21 10:23:37,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804488464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:37,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:37,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:37,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864857389] [2021-12-21 10:23:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:37,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:37,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:37,442 INFO L87 Difference]: Start difference. First operand 827 states and 1212 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 10:23:37,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,459 INFO L93 Difference]: Finished difference Result 1635 states and 2402 transitions. [2021-12-21 10:23:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:37,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 105 [2021-12-21 10:23:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,461 INFO L225 Difference]: With dead ends: 1635 [2021-12-21 10:23:37,461 INFO L226 Difference]: Without dead ends: 829 [2021-12-21 10:23:37,462 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 10:23:37,462 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-21 10:23:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-21 10:23:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 1.4661835748792271) internal successors, (1214), 828 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 10:23:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1214 transitions. [2021-12-21 10:23:37,474 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1214 transitions. Word has length 105 [2021-12-21 10:23:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,474 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1214 transitions. [2021-12-21 10:23:37,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 10:23:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1214 transitions. [2021-12-21 10:23:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 10:23:37,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:37,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:23:37,476 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1675942322, now seen corresponding path program 1 times [2021-12-21 10:23:37,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832208170] [2021-12-21 10:23:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 10:23:37,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:37,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832208170] [2021-12-21 10:23:37,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832208170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:37,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:37,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:37,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724663305] [2021-12-21 10:23:37,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:37,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:37,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:37,559 INFO L87 Difference]: Start difference. First operand 829 states and 1214 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,591 INFO L93 Difference]: Finished difference Result 2027 states and 2984 transitions. [2021-12-21 10:23:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-21 10:23:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,595 INFO L225 Difference]: With dead ends: 2027 [2021-12-21 10:23:37,595 INFO L226 Difference]: Without dead ends: 1221 [2021-12-21 10:23:37,596 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 10:23:37,596 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 569 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-21 10:23:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1219. [2021-12-21 10:23:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 1.4688013136288998) internal successors, (1789), 1218 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states 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 10:23:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1789 transitions. [2021-12-21 10:23:37,612 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1789 transitions. Word has length 107 [2021-12-21 10:23:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1789 transitions. [2021-12-21 10:23:37,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:23:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1789 transitions. [2021-12-21 10:23:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 10:23:37,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,615 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:23:37,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:23:37,615 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1041814139, now seen corresponding path program 1 times [2021-12-21 10:23:37,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743387964] [2021-12-21 10:23:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 10:23:37,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743387964] [2021-12-21 10:23:37,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743387964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:37,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:37,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:37,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669416719] [2021-12-21 10:23:37,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:37,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:37,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:37,685 INFO L87 Difference]: Start difference. First operand 1219 states and 1789 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 10:23:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,718 INFO L93 Difference]: Finished difference Result 2772 states and 4086 transitions. [2021-12-21 10:23:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 124 [2021-12-21 10:23:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,722 INFO L225 Difference]: With dead ends: 2772 [2021-12-21 10:23:37,722 INFO L226 Difference]: Without dead ends: 1576 [2021-12-21 10:23:37,724 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 10:23:37,727 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 142 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-12-21 10:23:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1576. [2021-12-21 10:23:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.4692063492063492) internal successors, (2314), 1575 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states 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 10:23:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2314 transitions. [2021-12-21 10:23:37,751 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2314 transitions. Word has length 124 [2021-12-21 10:23:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2314 transitions. [2021-12-21 10:23:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 10:23:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2314 transitions. [2021-12-21 10:23:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 10:23:37,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:37,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 10:23:37,754 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 726227607, now seen corresponding path program 1 times [2021-12-21 10:23:37,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329685015] [2021-12-21 10:23:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 10:23:37,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329685015] [2021-12-21 10:23:37,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329685015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:37,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:37,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:37,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290751577] [2021-12-21 10:23:37,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:37,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:37,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:37,863 INFO L87 Difference]: Start difference. First operand 1576 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 10:23:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:37,897 INFO L93 Difference]: Finished difference Result 2360 states and 3466 transitions. [2021-12-21 10:23:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:37,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 10:23:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:37,911 INFO L225 Difference]: With dead ends: 2360 [2021-12-21 10:23:37,911 INFO L226 Difference]: Without dead ends: 1968 [2021-12-21 10:23:37,913 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 10:23:37,913 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:37,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 373 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-12-21 10:23:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1966. [2021-12-21 10:23:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 1.4681933842239185) internal successors, (2885), 1965 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states 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 10:23:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2885 transitions. [2021-12-21 10:23:37,947 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2885 transitions. Word has length 128 [2021-12-21 10:23:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:37,948 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 2885 transitions. [2021-12-21 10:23:37,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 10:23:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2885 transitions. [2021-12-21 10:23:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 10:23:37,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:37,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:37,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 10:23:37,950 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1329906676, now seen corresponding path program 1 times [2021-12-21 10:23:37,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:37,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74562105] [2021-12-21 10:23:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:37,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 10:23:38,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:38,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74562105] [2021-12-21 10:23:38,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74562105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:38,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:38,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:38,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657786528] [2021-12-21 10:23:38,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:38,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:38,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:38,028 INFO L87 Difference]: Start difference. First operand 1966 states and 2885 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 10:23:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:38,064 INFO L93 Difference]: Finished difference Result 2360 states and 3462 transitions. [2021-12-21 10:23:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 129 [2021-12-21 10:23:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:38,070 INFO L225 Difference]: With dead ends: 2360 [2021-12-21 10:23:38,070 INFO L226 Difference]: Without dead ends: 2358 [2021-12-21 10:23:38,071 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 10:23:38,071 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:38,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-12-21 10:23:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2356. [2021-12-21 10:23:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 1.4687898089171973) internal successors, (3459), 2355 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states 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 10:23:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3459 transitions. [2021-12-21 10:23:38,128 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3459 transitions. Word has length 129 [2021-12-21 10:23:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:38,128 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 3459 transitions. [2021-12-21 10:23:38,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 10:23:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3459 transitions. [2021-12-21 10:23:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 10:23:38,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:38,131 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, 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] [2021-12-21 10:23:38,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 10:23:38,132 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash -991027209, now seen corresponding path program 1 times [2021-12-21 10:23:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:38,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917451367] [2021-12-21 10:23:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:38,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 10:23:38,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917451367] [2021-12-21 10:23:38,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917451367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:38,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:38,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:23:38,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144356183] [2021-12-21 10:23:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:38,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:23:38,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:23:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:23:38,216 INFO L87 Difference]: Start difference. First operand 2356 states and 3459 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 10:23:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:38,265 INFO L93 Difference]: Finished difference Result 5045 states and 7422 transitions. [2021-12-21 10:23:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:23:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 166 [2021-12-21 10:23:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:38,271 INFO L225 Difference]: With dead ends: 5045 [2021-12-21 10:23:38,271 INFO L226 Difference]: Without dead ends: 2712 [2021-12-21 10:23:38,274 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 10:23:38,276 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 572 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:23:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-12-21 10:23:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2712. [2021-12-21 10:23:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 1.4688306897823682) internal successors, (3982), 2711 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states 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 10:23:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3982 transitions. [2021-12-21 10:23:38,321 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3982 transitions. Word has length 166 [2021-12-21 10:23:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:38,321 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 3982 transitions. [2021-12-21 10:23:38,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 10:23:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3982 transitions. [2021-12-21 10:23:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-21 10:23:38,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:38,325 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, 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] [2021-12-21 10:23:38,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 10:23:38,325 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:38,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1009344134, now seen corresponding path program 1 times [2021-12-21 10:23:38,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:38,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523874428] [2021-12-21 10:23:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:38,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-21 10:23:38,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:38,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523874428] [2021-12-21 10:23:38,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523874428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:38,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:38,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:38,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715948680] [2021-12-21 10:23:38,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:38,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:38,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:38,438 INFO L87 Difference]: Start difference. First operand 2712 states and 3982 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 10:23:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:39,118 INFO L93 Difference]: Finished difference Result 5555 states and 8150 transitions. [2021-12-21 10:23:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 193 [2021-12-21 10:23:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:39,125 INFO L225 Difference]: With dead ends: 5555 [2021-12-21 10:23:39,125 INFO L226 Difference]: Without dead ends: 2866 [2021-12-21 10:23:39,127 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 10:23:39,128 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 40 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:39,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 562 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:23:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-12-21 10:23:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2712. [2021-12-21 10:23:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 1.466248616746588) internal successors, (3975), 2711 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states 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 10:23:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3975 transitions. [2021-12-21 10:23:39,175 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3975 transitions. Word has length 193 [2021-12-21 10:23:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:39,175 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 3975 transitions. [2021-12-21 10:23:39,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 10:23:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3975 transitions. [2021-12-21 10:23:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-21 10:23:39,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:39,179 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:23:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 10:23:39,180 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash 165425264, now seen corresponding path program 1 times [2021-12-21 10:23:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438432009] [2021-12-21 10:23:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:39,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 10:23:39,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438432009] [2021-12-21 10:23:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438432009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:39,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:39,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:23:39,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079554277] [2021-12-21 10:23:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:39,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:23:39,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:23:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:23:39,425 INFO L87 Difference]: Start difference. First operand 2712 states and 3975 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 10:23:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:41,971 INFO L93 Difference]: Finished difference Result 8665 states and 12591 transitions. [2021-12-21 10:23:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:23:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 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 201 [2021-12-21 10:23:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:41,996 INFO L225 Difference]: With dead ends: 8665 [2021-12-21 10:23:41,996 INFO L226 Difference]: Without dead ends: 5976 [2021-12-21 10:23:41,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:23:42,000 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 683 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:42,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 1202 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 10:23:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-12-21 10:23:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 3195. [2021-12-21 10:23:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 1.4724483406386975) internal successors, (4703), 3194 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states 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 10:23:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4703 transitions. [2021-12-21 10:23:42,097 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4703 transitions. Word has length 201 [2021-12-21 10:23:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4703 transitions. [2021-12-21 10:23:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 10:23:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4703 transitions. [2021-12-21 10:23:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-21 10:23:42,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:42,101 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:23:42,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 10:23:42,102 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash -721797582, now seen corresponding path program 1 times [2021-12-21 10:23:42,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:42,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74510283] [2021-12-21 10:23:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:42,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 10:23:42,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:42,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74510283] [2021-12-21 10:23:42,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74510283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:42,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:42,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:23:42,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899728397] [2021-12-21 10:23:42,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:42,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:23:42,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:23:42,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:23:42,306 INFO L87 Difference]: Start difference. First operand 3195 states and 4703 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 10:23:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:46,269 INFO L93 Difference]: Finished difference Result 9476 states and 13761 transitions. [2021-12-21 10:23:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:23:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 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 201 [2021-12-21 10:23:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:46,279 INFO L225 Difference]: With dead ends: 9476 [2021-12-21 10:23:46,280 INFO L226 Difference]: Without dead ends: 6304 [2021-12-21 10:23:46,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:23:46,284 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 622 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:46,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 1838 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-21 10:23:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-12-21 10:23:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3440. [2021-12-21 10:23:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.4780459435882525) internal successors, (5083), 3439 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states 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 10:23:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 5083 transitions. [2021-12-21 10:23:46,382 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 5083 transitions. Word has length 201 [2021-12-21 10:23:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:46,383 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 5083 transitions. [2021-12-21 10:23:46,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 10:23:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 5083 transitions. [2021-12-21 10:23:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-21 10:23:46,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:46,388 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:23:46,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 10:23:46,388 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2113515223, now seen corresponding path program 1 times [2021-12-21 10:23:46,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:46,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655654880] [2021-12-21 10:23:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:46,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 10:23:46,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:46,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655654880] [2021-12-21 10:23:46,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655654880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:46,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:46,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:23:46,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401332886] [2021-12-21 10:23:46,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:46,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:23:46,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:46,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:23:46,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:23:46,556 INFO L87 Difference]: Start difference. First operand 3440 states and 5083 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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 10:23:49,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:23:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:49,872 INFO L93 Difference]: Finished difference Result 9121 states and 13311 transitions. [2021-12-21 10:23:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:23:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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 202 [2021-12-21 10:23:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:49,881 INFO L225 Difference]: With dead ends: 9121 [2021-12-21 10:23:49,881 INFO L226 Difference]: Without dead ends: 5704 [2021-12-21 10:23:49,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:23:49,885 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 502 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:49,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 1230 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 10:23:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-12-21 10:23:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 3447. [2021-12-21 10:23:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 1.4770748694138132) internal successors, (5090), 3446 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states 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 10:23:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5090 transitions. [2021-12-21 10:23:49,996 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5090 transitions. Word has length 202 [2021-12-21 10:23:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:49,996 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5090 transitions. [2021-12-21 10:23:49,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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 10:23:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5090 transitions. [2021-12-21 10:23:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-21 10:23:50,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:50,008 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:23:50,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 10:23:50,008 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:50,009 INFO L85 PathProgramCache]: Analyzing trace with hash 379410773, now seen corresponding path program 1 times [2021-12-21 10:23:50,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:50,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440306376] [2021-12-21 10:23:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:50,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 10:23:50,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:50,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440306376] [2021-12-21 10:23:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440306376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:50,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:50,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:23:50,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673283096] [2021-12-21 10:23:50,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:50,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:23:50,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:23:50,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:23:50,209 INFO L87 Difference]: Start difference. First operand 3447 states and 5090 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 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 10:23:51,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:23:53,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:23:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:56,236 INFO L93 Difference]: Finished difference Result 8395 states and 12284 transitions. [2021-12-21 10:23:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:23:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 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 202 [2021-12-21 10:23:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:56,244 INFO L225 Difference]: With dead ends: 8395 [2021-12-21 10:23:56,244 INFO L226 Difference]: Without dead ends: 4971 [2021-12-21 10:23:56,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:23:56,248 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 299 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:56,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 1632 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1119 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-12-21 10:23:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2021-12-21 10:23:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 3454. [2021-12-21 10:23:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.476107732406603) internal successors, (5097), 3453 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states 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 10:23:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5097 transitions. [2021-12-21 10:23:56,323 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5097 transitions. Word has length 202 [2021-12-21 10:23:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:56,323 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5097 transitions. [2021-12-21 10:23:56,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 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 10:23:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5097 transitions. [2021-12-21 10:23:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-21 10:23:56,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:56,328 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 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] [2021-12-21 10:23:56,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 10:23:56,328 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash 995224690, now seen corresponding path program 1 times [2021-12-21 10:23:56,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:56,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978663747] [2021-12-21 10:23:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:56,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 10:23:56,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:56,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978663747] [2021-12-21 10:23:56,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978663747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:23:56,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:23:56,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:23:56,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938738423] [2021-12-21 10:23:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:23:56,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:23:56,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:23:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:23:56,456 INFO L87 Difference]: Start difference. First operand 3454 states and 5097 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 10:23:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:23:57,385 INFO L93 Difference]: Finished difference Result 7039 states and 10380 transitions. [2021-12-21 10:23:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:23:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 215 [2021-12-21 10:23:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:23:57,390 INFO L225 Difference]: With dead ends: 7039 [2021-12-21 10:23:57,390 INFO L226 Difference]: Without dead ends: 3608 [2021-12-21 10:23:57,393 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 10:23:57,394 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 45 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:23:57,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 561 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:23:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2021-12-21 10:23:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3454. [2021-12-21 10:23:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4740805097017087) internal successors, (5090), 3453 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states 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 10:23:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5090 transitions. [2021-12-21 10:23:57,461 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5090 transitions. Word has length 215 [2021-12-21 10:23:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:23:57,461 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5090 transitions. [2021-12-21 10:23:57,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 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 10:23:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5090 transitions. [2021-12-21 10:23:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-21 10:23:57,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:23:57,466 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 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] [2021-12-21 10:23:57,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 10:23:57,466 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:23:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:23:57,467 INFO L85 PathProgramCache]: Analyzing trace with hash 74896286, now seen corresponding path program 1 times [2021-12-21 10:23:57,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:23:57,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812535432] [2021-12-21 10:23:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:57,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:23:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 344 proven. 38 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-21 10:23:57,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:23:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812535432] [2021-12-21 10:23:57,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812535432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:23:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067782909] [2021-12-21 10:23:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:23:57,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:23:57,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:23:57,592 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 10:23:57,592 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 10:23:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:23:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 10:23:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:23:58,278 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:23:58,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-21 10:23:58,321 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:23:58,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:23:58,393 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:23:58,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-21 10:23:58,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:23:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 330 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-21 10:23:58,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:23:58,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2021-12-21 10:23:58,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-21 10:23:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 334 proven. 9 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-21 10:23:58,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067782909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:23:58,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:23:58,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 12 [2021-12-21 10:23:58,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318295584] [2021-12-21 10:23:58,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:23:58,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:23:58,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:23:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:23:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:23:58,889 INFO L87 Difference]: Start difference. First operand 3454 states and 5090 transitions. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:00,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:03,728 INFO L93 Difference]: Finished difference Result 9188 states and 13433 transitions. [2021-12-21 10:24:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 10:24:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-21 10:24:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:03,740 INFO L225 Difference]: With dead ends: 9188 [2021-12-21 10:24:03,740 INFO L226 Difference]: Without dead ends: 5757 [2021-12-21 10:24:03,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-12-21 10:24:03,744 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 1024 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:03,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1951 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-21 10:24:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2021-12-21 10:24:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 3454. [2021-12-21 10:24:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4587315377932233) internal successors, (5037), 3453 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states 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 10:24:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5037 transitions. [2021-12-21 10:24:03,827 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5037 transitions. Word has length 215 [2021-12-21 10:24:03,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:03,827 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5037 transitions. [2021-12-21 10:24:03,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:24:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5037 transitions. [2021-12-21 10:24:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 10:24:03,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:03,831 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 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] [2021-12-21 10:24:03,855 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 10:24:04,052 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,SelfDestructingSolverStorable38 [2021-12-21 10:24:04,053 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash 82923196, now seen corresponding path program 1 times [2021-12-21 10:24:04,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:04,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659425434] [2021-12-21 10:24:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:04,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 151 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 [1659425434] [2021-12-21 10:24:04,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659425434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:04,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:04,280 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 [475148190] [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 3454 states and 5037 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 10:24:05,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:05,568 INFO L93 Difference]: Finished difference Result 7011 states and 10224 transitions. [2021-12-21 10:24:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 216 [2021-12-21 10:24:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:05,573 INFO L225 Difference]: With dead ends: 7011 [2021-12-21 10:24:05,573 INFO L226 Difference]: Without dead ends: 3580 [2021-12-21 10:24:05,577 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 10:24:05,577 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 38 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:05,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 551 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:24:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-12-21 10:24:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3454. [2021-12-21 10:24:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.456704315088329) internal successors, (5030), 3453 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states 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 10:24:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5030 transitions. [2021-12-21 10:24:05,652 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5030 transitions. Word has length 216 [2021-12-21 10:24:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:05,652 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5030 transitions. [2021-12-21 10:24:05,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 10:24:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5030 transitions. [2021-12-21 10:24:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 10:24:05,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:05,659 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 4, 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] [2021-12-21 10:24:05,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 10:24:05,659 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash 41488008, now seen corresponding path program 1 times [2021-12-21 10:24:05,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:05,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980571519] [2021-12-21 10:24:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:05,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 10:24:05,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:05,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980571519] [2021-12-21 10:24:05,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980571519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:05,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:05,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:05,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358063555] [2021-12-21 10:24:05,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:05,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:05,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:05,801 INFO L87 Difference]: Start difference. First operand 3454 states and 5030 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 10:24:06,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:24:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:07,054 INFO L93 Difference]: Finished difference Result 6977 states and 10168 transitions. [2021-12-21 10:24:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 216 [2021-12-21 10:24:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:07,072 INFO L225 Difference]: With dead ends: 6977 [2021-12-21 10:24:07,080 INFO L226 Difference]: Without dead ends: 3546 [2021-12-21 10:24:07,083 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 10:24:07,083 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 29 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:07,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 539 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 10:24:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-12-21 10:24:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3454. [2021-12-21 10:24:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4546770923834347) internal successors, (5023), 3453 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states 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 10:24:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5023 transitions. [2021-12-21 10:24:07,234 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5023 transitions. Word has length 216 [2021-12-21 10:24:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:07,234 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5023 transitions. [2021-12-21 10:24:07,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 10:24:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5023 transitions. [2021-12-21 10:24:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-21 10:24:07,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:07,238 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, 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, 1, 1, 1, 1, 1] [2021-12-21 10:24:07,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 10:24:07,238 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:07,239 INFO L85 PathProgramCache]: Analyzing trace with hash 404371753, now seen corresponding path program 1 times [2021-12-21 10:24:07,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:07,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734277529] [2021-12-21 10:24:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:07,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-21 10:24:07,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734277529] [2021-12-21 10:24:07,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734277529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:07,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:07,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:24:07,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624773282] [2021-12-21 10:24:07,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:07,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:07,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:24:07,368 INFO L87 Difference]: Start difference. First operand 3454 states and 5023 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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 10:24:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:08,100 INFO L93 Difference]: Finished difference Result 7207 states and 10456 transitions. [2021-12-21 10:24:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:08,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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 218 [2021-12-21 10:24:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:08,104 INFO L225 Difference]: With dead ends: 7207 [2021-12-21 10:24:08,105 INFO L226 Difference]: Without dead ends: 3776 [2021-12-21 10:24:08,107 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 10:24:08,107 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 31 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:08,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 581 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:24:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-12-21 10:24:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3664. [2021-12-21 10:24:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 1.4515424515424515) internal successors, (5317), 3663 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states 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 10:24:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 5317 transitions. [2021-12-21 10:24:08,183 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 5317 transitions. Word has length 218 [2021-12-21 10:24:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:08,183 INFO L470 AbstractCegarLoop]: Abstraction has 3664 states and 5317 transitions. [2021-12-21 10:24:08,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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 10:24:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 5317 transitions. [2021-12-21 10:24:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-21 10:24:08,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:08,187 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:24:08,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 10:24:08,188 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1297638648, now seen corresponding path program 1 times [2021-12-21 10:24:08,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:08,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331631234] [2021-12-21 10:24:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:08,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 254 proven. 6 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-21 10:24:08,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331631234] [2021-12-21 10:24:08,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331631234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105776776] [2021-12-21 10:24:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:08,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:24:08,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:24:08,312 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 10:24:08,353 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 10:24:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 10:24:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:24:09,114 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:24:09,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-21 10:24:09,159 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:24:09,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:24:09,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-21 10:24:09,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 10:24:09,356 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:24:09,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 10:24:09,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:24:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 249 proven. 70 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-21 10:24:09,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:24:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-21 10:24:09,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105776776] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:09,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:24:09,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2021-12-21 10:24:09,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130258347] [2021-12-21 10:24:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:09,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:24:09,829 INFO L87 Difference]: Start difference. First operand 3664 states and 5317 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 10:24:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:10,811 INFO L93 Difference]: Finished difference Result 8046 states and 11661 transitions. [2021-12-21 10:24:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 223 [2021-12-21 10:24:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:10,839 INFO L225 Difference]: With dead ends: 8046 [2021-12-21 10:24:10,839 INFO L226 Difference]: Without dead ends: 4405 [2021-12-21 10:24:10,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 445 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:24:10,844 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 111 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:10,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 354 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:24:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4405 states. [2021-12-21 10:24:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4405 to 3923. [2021-12-21 10:24:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3922 states have (on average 1.4520652728199899) internal successors, (5695), 3922 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states 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 10:24:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 5695 transitions. [2021-12-21 10:24:11,022 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 5695 transitions. Word has length 223 [2021-12-21 10:24:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:11,023 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 5695 transitions. [2021-12-21 10:24:11,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 10:24:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 5695 transitions. [2021-12-21 10:24:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-21 10:24:11,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:11,035 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 10:24:11,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:24:11,251 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,SelfDestructingSolverStorable42 [2021-12-21 10:24:11,252 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1442575537, now seen corresponding path program 1 times [2021-12-21 10:24:11,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:11,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49968901] [2021-12-21 10:24:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:11,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 252 proven. 84 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 10:24:11,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:11,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49968901] [2021-12-21 10:24:11,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49968901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:11,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309968678] [2021-12-21 10:24:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:11,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:24:11,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:24:11,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:24:11,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:24:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 10:24:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:24:12,232 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:24:12,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-21 10:24:12,271 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:24:12,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:24:12,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-21 10:24:12,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 10:24:12,450 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:24:12,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 10:24:12,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:24:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 252 proven. 69 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 10:24:12,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:24:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-21 10:24:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309968678] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:12,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:24:12,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2021-12-21 10:24:12,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641583844] [2021-12-21 10:24:12,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:12,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:24:12,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:24:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:24:12,832 INFO L87 Difference]: Start difference. First operand 3923 states and 5695 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 10:24:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:13,383 INFO L93 Difference]: Finished difference Result 8291 states and 12004 transitions. [2021-12-21 10:24:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:24:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 224 [2021-12-21 10:24:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:13,386 INFO L225 Difference]: With dead ends: 8291 [2021-12-21 10:24:13,387 INFO L226 Difference]: Without dead ends: 4391 [2021-12-21 10:24:13,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:24:13,389 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 110 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:13,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 358 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:24:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-12-21 10:24:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3465. [2021-12-21 10:24:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.4454387990762125) internal successors, (5007), 3464 states have internal predecessors, (5007), 0 states have call successors, (0), 0 states 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 10:24:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5007 transitions. [2021-12-21 10:24:13,466 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5007 transitions. Word has length 224 [2021-12-21 10:24:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:13,466 INFO L470 AbstractCegarLoop]: Abstraction has 3465 states and 5007 transitions. [2021-12-21 10:24:13,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 10:24:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5007 transitions. [2021-12-21 10:24:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-21 10:24:13,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:13,469 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-12-21 10:24:13,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:24:13,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:24:13,691 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash 638259024, now seen corresponding path program 1 times [2021-12-21 10:24:13,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:13,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79454153] [2021-12-21 10:24:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:13,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-21 10:24:13,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:13,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79454153] [2021-12-21 10:24:13,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79454153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:24:13,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:24:13,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:24:13,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559282178] [2021-12-21 10:24:13,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:24:13,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:24:13,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:24:13,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:24:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:24:13,891 INFO L87 Difference]: Start difference. First operand 3465 states and 5007 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 10:24:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:24:15,649 INFO L93 Difference]: Finished difference Result 6927 states and 10010 transitions. [2021-12-21 10:24:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:24:15,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 230 [2021-12-21 10:24:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:24:15,654 INFO L225 Difference]: With dead ends: 6927 [2021-12-21 10:24:15,654 INFO L226 Difference]: Without dead ends: 3465 [2021-12-21 10:24:15,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:24:15,656 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:24:15,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 10:24:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-12-21 10:24:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3465. [2021-12-21 10:24:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.4451501154734412) internal successors, (5006), 3464 states have internal predecessors, (5006), 0 states have call successors, (0), 0 states 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 10:24:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5006 transitions. [2021-12-21 10:24:15,735 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5006 transitions. Word has length 230 [2021-12-21 10:24:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:24:15,736 INFO L470 AbstractCegarLoop]: Abstraction has 3465 states and 5006 transitions. [2021-12-21 10:24:15,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 10:24:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5006 transitions. [2021-12-21 10:24:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-21 10:24:15,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:24:15,739 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-12-21 10:24:15,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 10:24:15,739 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:24:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:24:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2032488434, now seen corresponding path program 1 times [2021-12-21 10:24:15,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:24:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718110305] [2021-12-21 10:24:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:15,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:24:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 183 proven. 265 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:24:16,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:24:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718110305] [2021-12-21 10:24:16,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718110305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:24:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473167686] [2021-12-21 10:24:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:24:16,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:24:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:24:16,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:24:16,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:24:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:24:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 187 conjunts are in the unsatisfiable core [2021-12-21 10:24:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:24:17,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11920650 treesize of output 7721962 [2021-12-21 10:24:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:24:17,969 INFO L353 Elim1Store]: treesize reduction 520, result has 8.1 percent of original size [2021-12-21 10:24:17,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 59059243 treesize of output 59059262