./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e559d44f6ee539bed570b1939999945f6f48ca1506c283f526f35c026a08bf8f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:22:14,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:22:14,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:22:14,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:22:14,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:22:14,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:22:14,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:22:14,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:22:14,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:22:14,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:22:14,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:22:14,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:22:14,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:22:14,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:22:14,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:22:14,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:22:14,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:22:14,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:22:14,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:22:14,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:22:14,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:22:14,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:22:14,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:22:14,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:22:14,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:22:14,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:22:14,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:22:14,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:22:14,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:22:14,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:22:14,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:22:14,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:22:14,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:22:14,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:22:14,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:22:14,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:22:14,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:22:14,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:22:14,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:22:14,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:22:14,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:22:14,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:22:14,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:22:14,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:22:14,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:22:14,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:22:14,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:22:14,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:22:14,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:22:14,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:22:14,319 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:22:14,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:22:14,320 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:22:14,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:22:14,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:22:14,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:22:14,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:22:14,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:22:14,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:22:14,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:22:14,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e559d44f6ee539bed570b1939999945f6f48ca1506c283f526f35c026a08bf8f [2021-12-17 03:22:14,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:22:14,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:22:14,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:22:14,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:22:14,540 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:22:14,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c [2021-12-17 03:22:14,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d30d976/aed1daf3d8c94907b78c0e0cdcfbeeaf/FLAG055da59d6 [2021-12-17 03:22:15,025 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:22:15,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c [2021-12-17 03:22:15,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d30d976/aed1daf3d8c94907b78c0e0cdcfbeeaf/FLAG055da59d6 [2021-12-17 03:22:15,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d30d976/aed1daf3d8c94907b78c0e0cdcfbeeaf [2021-12-17 03:22:15,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:22:15,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:22:15,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:22:15,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:22:15,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:22:15,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e768184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15, skipping insertion in model container [2021-12-17 03:22:15,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:22:15,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:22:15,720 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.15.i.cil-2.c[75833,75846] [2021-12-17 03:22:15,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:22:15,733 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:22:15,794 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.15.i.cil-2.c[75833,75846] [2021-12-17 03:22:15,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:22:15,807 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:22:15,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15 WrapperNode [2021-12-17 03:22:15,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:22:15,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:22:15,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:22:15,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:22:15,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,863 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 800 [2021-12-17 03:22:15,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:22:15,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:22:15,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:22:15,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:22:15,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:22:15,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:22:15,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:22:15,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:22:15,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (1/1) ... [2021-12-17 03:22:15,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:22:15,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:22:15,944 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) [2021-12-17 03:22:15,959 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 [2021-12-17 03:22:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:22:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:22:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:22:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:22:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:22:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:22:15,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:22:15,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:22:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:22:16,146 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:22:16,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:22:16,177 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:22:18,444 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:22:18,445 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:22:18,445 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:22:18,449 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:22:18,450 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:22:18,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:22:18 BoogieIcfgContainer [2021-12-17 03:22:18,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:22:18,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:22:18,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:22:18,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:22:18,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:22:15" (1/3) ... [2021-12-17 03:22:18,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696170eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:22:18, skipping insertion in model container [2021-12-17 03:22:18,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:22:15" (2/3) ... [2021-12-17 03:22:18,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696170eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:22:18, skipping insertion in model container [2021-12-17 03:22:18,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:22:18" (3/3) ... [2021-12-17 03:22:18,457 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-2.c [2021-12-17 03:22:18,461 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:22:18,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:22:18,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:22:18,495 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 [2021-12-17 03:22:18,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:22:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 153 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 03:22:18,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:18,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:18,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash 983008807, now seen corresponding path program 1 times [2021-12-17 03:22:18,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:18,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731321773] [2021-12-17 03:22:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:18,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:18,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:18,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731321773] [2021-12-17 03:22:18,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731321773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:18,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:18,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:18,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121694242] [2021-12-17 03:22:18,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:18,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:18,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:18,928 INFO L87 Difference]: Start difference. First operand has 154 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 153 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:19,785 INFO L93 Difference]: Finished difference Result 431 states and 736 transitions. [2021-12-17 03:22:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-17 03:22:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:19,818 INFO L225 Difference]: With dead ends: 431 [2021-12-17 03:22:19,819 INFO L226 Difference]: Without dead ends: 262 [2021-12-17 03:22:19,822 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 [2021-12-17 03:22:19,827 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 160 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:19,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 465 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:22:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-17 03:22:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 181. [2021-12-17 03:22:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6166666666666667) internal successors, (291), 180 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2021-12-17 03:22:19,876 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 46 [2021-12-17 03:22:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:19,876 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2021-12-17 03:22:19,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2021-12-17 03:22:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 03:22:19,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:19,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:19,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:22:19,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash -829195320, now seen corresponding path program 1 times [2021-12-17 03:22:19,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:19,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628998397] [2021-12-17 03:22:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:19,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:19,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:19,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628998397] [2021-12-17 03:22:19,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628998397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:19,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:19,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:19,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108568404] [2021-12-17 03:22:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:19,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:19,969 INFO L87 Difference]: Start difference. First operand 181 states and 291 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:20,404 INFO L93 Difference]: Finished difference Result 380 states and 609 transitions. [2021-12-17 03:22:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-17 03:22:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:20,406 INFO L225 Difference]: With dead ends: 380 [2021-12-17 03:22:20,406 INFO L226 Difference]: Without dead ends: 209 [2021-12-17 03:22:20,407 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 [2021-12-17 03:22:20,408 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 22 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:20,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 493 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:22:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-17 03:22:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2021-12-17 03:22:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.6230366492146597) internal successors, (310), 191 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 310 transitions. [2021-12-17 03:22:20,415 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 310 transitions. Word has length 47 [2021-12-17 03:22:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 310 transitions. [2021-12-17 03:22:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 310 transitions. [2021-12-17 03:22:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:22:20,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:20,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:20,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:22:20,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1049124123, now seen corresponding path program 1 times [2021-12-17 03:22:20,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:20,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741312702] [2021-12-17 03:22:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:20,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:20,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741312702] [2021-12-17 03:22:20,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741312702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:20,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:20,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:20,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270976689] [2021-12-17 03:22:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:20,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:20,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:20,521 INFO L87 Difference]: Start difference. First operand 192 states and 310 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) [2021-12-17 03:22:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:21,162 INFO L93 Difference]: Finished difference Result 522 states and 847 transitions. [2021-12-17 03:22:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:21,163 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 [2021-12-17 03:22:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:21,164 INFO L225 Difference]: With dead ends: 522 [2021-12-17 03:22:21,165 INFO L226 Difference]: Without dead ends: 351 [2021-12-17 03:22:21,165 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 [2021-12-17 03:22:21,166 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 149 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:21,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 650 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:22:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-17 03:22:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2021-12-17 03:22:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.6188340807174888) internal successors, (361), 223 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 361 transitions. [2021-12-17 03:22:21,176 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 361 transitions. Word has length 60 [2021-12-17 03:22:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:21,176 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 361 transitions. [2021-12-17 03:22:21,176 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) [2021-12-17 03:22:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 361 transitions. [2021-12-17 03:22:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:22:21,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:21,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:21,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:22:21,179 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1463598922, now seen corresponding path program 1 times [2021-12-17 03:22:21,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55248588] [2021-12-17 03:22:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:21,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:21,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55248588] [2021-12-17 03:22:21,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55248588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:21,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:21,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167821130] [2021-12-17 03:22:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:21,300 INFO L87 Difference]: Start difference. First operand 224 states and 361 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) [2021-12-17 03:22:23,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:23,380 INFO L93 Difference]: Finished difference Result 530 states and 850 transitions. [2021-12-17 03:22:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:23,381 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 [2021-12-17 03:22:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:23,382 INFO L225 Difference]: With dead ends: 530 [2021-12-17 03:22:23,382 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 03:22:23,383 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 [2021-12-17 03:22:23,383 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 154 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:23,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 358 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:22:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 03:22:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 224. [2021-12-17 03:22:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.600896860986547) internal successors, (357), 223 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 357 transitions. [2021-12-17 03:22:23,389 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 357 transitions. Word has length 61 [2021-12-17 03:22:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:23,390 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 357 transitions. [2021-12-17 03:22:23,390 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) [2021-12-17 03:22:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 357 transitions. [2021-12-17 03:22:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:22:23,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:23,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:23,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:22:23,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:23,391 INFO L85 PathProgramCache]: Analyzing trace with hash -625588150, now seen corresponding path program 1 times [2021-12-17 03:22:23,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:23,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852099365] [2021-12-17 03:22:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:23,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:23,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852099365] [2021-12-17 03:22:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852099365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:23,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:23,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:23,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419866597] [2021-12-17 03:22:23,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:23,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:23,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:23,505 INFO L87 Difference]: Start difference. First operand 224 states and 357 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) [2021-12-17 03:22:25,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:25,840 INFO L93 Difference]: Finished difference Result 530 states and 843 transitions. [2021-12-17 03:22:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:25,840 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 [2021-12-17 03:22:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:25,842 INFO L225 Difference]: With dead ends: 530 [2021-12-17 03:22:25,842 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 03:22:25,842 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 [2021-12-17 03:22:25,843 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 152 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:25,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 358 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:22:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 03:22:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 224. [2021-12-17 03:22:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5829596412556053) internal successors, (353), 223 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 353 transitions. [2021-12-17 03:22:25,848 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 353 transitions. Word has length 61 [2021-12-17 03:22:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:25,848 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 353 transitions. [2021-12-17 03:22:25,848 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) [2021-12-17 03:22:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 353 transitions. [2021-12-17 03:22:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:22:25,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:25,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:25,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:22:25,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash 828942689, now seen corresponding path program 1 times [2021-12-17 03:22:25,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:25,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739244143] [2021-12-17 03:22:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:25,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:25,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739244143] [2021-12-17 03:22:25,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739244143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:25,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:25,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:25,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648135091] [2021-12-17 03:22:25,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:25,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:25,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:25,918 INFO L87 Difference]: Start difference. First operand 224 states and 353 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) [2021-12-17 03:22:27,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:28,104 INFO L93 Difference]: Finished difference Result 442 states and 695 transitions. [2021-12-17 03:22:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:28,104 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 [2021-12-17 03:22:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:28,105 INFO L225 Difference]: With dead ends: 442 [2021-12-17 03:22:28,105 INFO L226 Difference]: Without dead ends: 239 [2021-12-17 03:22:28,105 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 [2021-12-17 03:22:28,106 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 19 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:28,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 499 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:22:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-17 03:22:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2021-12-17 03:22:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5784753363228698) internal successors, (352), 223 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 352 transitions. [2021-12-17 03:22:28,110 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 352 transitions. Word has length 61 [2021-12-17 03:22:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:28,111 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 352 transitions. [2021-12-17 03:22:28,111 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) [2021-12-17 03:22:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 352 transitions. [2021-12-17 03:22:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:22:28,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:28,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:28,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:22:28,112 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash -120405471, now seen corresponding path program 1 times [2021-12-17 03:22:28,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:28,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936049572] [2021-12-17 03:22:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:28,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:28,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:28,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936049572] [2021-12-17 03:22:28,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936049572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:28,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:28,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:28,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003356047] [2021-12-17 03:22:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:28,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:28,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:28,189 INFO L87 Difference]: Start difference. First operand 224 states and 352 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) [2021-12-17 03:22:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:28,910 INFO L93 Difference]: Finished difference Result 530 states and 835 transitions. [2021-12-17 03:22:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:28,911 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 [2021-12-17 03:22:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:28,912 INFO L225 Difference]: With dead ends: 530 [2021-12-17 03:22:28,912 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 03:22:28,912 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 [2021-12-17 03:22:28,913 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 146 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 358 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 [2021-12-17 03:22:28,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 358 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:22:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 03:22:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 225. [2021-12-17 03:22:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5669642857142858) internal successors, (351), 224 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 351 transitions. [2021-12-17 03:22:28,918 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 351 transitions. Word has length 61 [2021-12-17 03:22:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:28,918 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 351 transitions. [2021-12-17 03:22:28,918 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) [2021-12-17 03:22:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 351 transitions. [2021-12-17 03:22:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:22:28,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:28,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:22:28,919 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2112722766, now seen corresponding path program 1 times [2021-12-17 03:22:28,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106732225] [2021-12-17 03:22:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:28,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:28,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106732225] [2021-12-17 03:22:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106732225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:28,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:28,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:28,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852789094] [2021-12-17 03:22:28,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:28,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:28,986 INFO L87 Difference]: Start difference. First operand 225 states and 351 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:29,427 INFO L93 Difference]: Finished difference Result 442 states and 691 transitions. [2021-12-17 03:22:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:22:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:29,429 INFO L225 Difference]: With dead ends: 442 [2021-12-17 03:22:29,429 INFO L226 Difference]: Without dead ends: 238 [2021-12-17 03:22:29,429 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 [2021-12-17 03:22:29,430 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 22 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 503 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 [2021-12-17 03:22:29,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 503 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:22:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-17 03:22:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 225. [2021-12-17 03:22:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5625) internal successors, (350), 224 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 350 transitions. [2021-12-17 03:22:29,435 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 350 transitions. Word has length 62 [2021-12-17 03:22:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:29,435 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 350 transitions. [2021-12-17 03:22:29,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 350 transitions. [2021-12-17 03:22:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 03:22:29,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:29,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:29,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:22:29,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1062218447, now seen corresponding path program 1 times [2021-12-17 03:22:29,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:29,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433231657] [2021-12-17 03:22:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:29,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:29,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433231657] [2021-12-17 03:22:29,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433231657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:29,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:29,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:29,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749920675] [2021-12-17 03:22:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:29,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:29,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:29,528 INFO L87 Difference]: Start difference. First operand 225 states and 350 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:31,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:31,433 INFO L93 Difference]: Finished difference Result 531 states and 831 transitions. [2021-12-17 03:22:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 03:22:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:31,435 INFO L225 Difference]: With dead ends: 531 [2021-12-17 03:22:31,435 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 03:22:31,435 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 [2021-12-17 03:22:31,436 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 148 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:31,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 358 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:22:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 03:22:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 225. [2021-12-17 03:22:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5446428571428572) internal successors, (346), 224 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 346 transitions. [2021-12-17 03:22:31,441 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 346 transitions. Word has length 63 [2021-12-17 03:22:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:31,441 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 346 transitions. [2021-12-17 03:22:31,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 346 transitions. [2021-12-17 03:22:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 03:22:31,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:31,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:31,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:22:31,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1477441165, now seen corresponding path program 1 times [2021-12-17 03:22:31,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245596657] [2021-12-17 03:22:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:31,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:31,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245596657] [2021-12-17 03:22:31,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245596657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:31,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:31,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:31,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425431283] [2021-12-17 03:22:31,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:31,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:31,516 INFO L87 Difference]: Start difference. First operand 225 states and 346 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:32,236 INFO L93 Difference]: Finished difference Result 531 states and 824 transitions. [2021-12-17 03:22:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 03:22:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:32,238 INFO L225 Difference]: With dead ends: 531 [2021-12-17 03:22:32,238 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 03:22:32,238 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 [2021-12-17 03:22:32,239 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 146 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 358 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 [2021-12-17 03:22:32,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 358 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:22:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 03:22:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 225. [2021-12-17 03:22:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5267857142857142) internal successors, (342), 224 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 342 transitions. [2021-12-17 03:22:32,253 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 342 transitions. Word has length 64 [2021-12-17 03:22:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:32,253 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 342 transitions. [2021-12-17 03:22:32,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 342 transitions. [2021-12-17 03:22:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 03:22:32,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:32,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:32,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:22:32,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:32,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1077289765, now seen corresponding path program 1 times [2021-12-17 03:22:32,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:32,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906699029] [2021-12-17 03:22:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:32,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:22:32,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:32,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906699029] [2021-12-17 03:22:32,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906699029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:32,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:32,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:32,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517561749] [2021-12-17 03:22:32,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:32,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:32,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:32,326 INFO L87 Difference]: Start difference. First operand 225 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:34,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:34,284 INFO L93 Difference]: Finished difference Result 531 states and 817 transitions. [2021-12-17 03:22:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 03:22:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:34,286 INFO L225 Difference]: With dead ends: 531 [2021-12-17 03:22:34,286 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 03:22:34,286 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 [2021-12-17 03:22:34,287 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:34,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 384 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:22:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 03:22:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 248. [2021-12-17 03:22:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5668016194331984) internal successors, (387), 247 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 387 transitions. [2021-12-17 03:22:34,292 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 387 transitions. Word has length 64 [2021-12-17 03:22:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:34,292 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 387 transitions. [2021-12-17 03:22:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 387 transitions. [2021-12-17 03:22:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 03:22:34,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:34,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:34,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:22:34,293 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash -212151294, now seen corresponding path program 1 times [2021-12-17 03:22:34,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:34,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828861190] [2021-12-17 03:22:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:34,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:22:34,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828861190] [2021-12-17 03:22:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828861190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:34,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:34,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:34,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662012044] [2021-12-17 03:22:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:34,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:34,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:34,381 INFO L87 Difference]: Start difference. First operand 248 states and 387 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:34,871 INFO L93 Difference]: Finished difference Result 515 states and 806 transitions. [2021-12-17 03:22:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-17 03:22:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:34,873 INFO L225 Difference]: With dead ends: 515 [2021-12-17 03:22:34,873 INFO L226 Difference]: Without dead ends: 288 [2021-12-17 03:22:34,874 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 [2021-12-17 03:22:34,874 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 28 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:34,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 521 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:22:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-17 03:22:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2021-12-17 03:22:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.5576208178438662) internal successors, (419), 269 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 419 transitions. [2021-12-17 03:22:34,880 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 419 transitions. Word has length 92 [2021-12-17 03:22:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:34,880 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 419 transitions. [2021-12-17 03:22:34,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 419 transitions. [2021-12-17 03:22:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 03:22:34,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:34,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:34,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:22:34,882 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash 308909275, now seen corresponding path program 1 times [2021-12-17 03:22:34,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:34,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124576790] [2021-12-17 03:22:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:34,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:22:34,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:34,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124576790] [2021-12-17 03:22:34,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124576790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:34,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:34,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:34,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346495933] [2021-12-17 03:22:34,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:34,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:34,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:34,965 INFO L87 Difference]: Start difference. First operand 270 states and 419 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:35,916 INFO L93 Difference]: Finished difference Result 536 states and 836 transitions. [2021-12-17 03:22:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-17 03:22:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:35,917 INFO L225 Difference]: With dead ends: 536 [2021-12-17 03:22:35,918 INFO L226 Difference]: Without dead ends: 287 [2021-12-17 03:22:35,918 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 [2021-12-17 03:22:35,918 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 31 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:35,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:22:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-17 03:22:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 270. [2021-12-17 03:22:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.553903345724907) internal successors, (418), 269 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 418 transitions. [2021-12-17 03:22:35,923 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 418 transitions. Word has length 106 [2021-12-17 03:22:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:35,923 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 418 transitions. [2021-12-17 03:22:35,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 418 transitions. [2021-12-17 03:22:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 03:22:35,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:35,924 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:35,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:22:35,925 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1047135490, now seen corresponding path program 1 times [2021-12-17 03:22:35,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:35,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280599703] [2021-12-17 03:22:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:35,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:22:36,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:36,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280599703] [2021-12-17 03:22:36,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280599703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:36,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:36,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:36,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878371652] [2021-12-17 03:22:36,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:36,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:36,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:36,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:36,007 INFO L87 Difference]: Start difference. First operand 270 states and 418 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:36,493 INFO L93 Difference]: Finished difference Result 526 states and 821 transitions. [2021-12-17 03:22:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:36,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-17 03:22:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:36,494 INFO L225 Difference]: With dead ends: 526 [2021-12-17 03:22:36,494 INFO L226 Difference]: Without dead ends: 277 [2021-12-17 03:22:36,495 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 [2021-12-17 03:22:36,495 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 28 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:36,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 537 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:22:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-17 03:22:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2021-12-17 03:22:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.550185873605948) internal successors, (417), 269 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 417 transitions. [2021-12-17 03:22:36,500 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 417 transitions. Word has length 107 [2021-12-17 03:22:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:36,500 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 417 transitions. [2021-12-17 03:22:36,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 417 transitions. [2021-12-17 03:22:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 03:22:36,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:36,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:36,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:22:36,501 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash 619125706, now seen corresponding path program 1 times [2021-12-17 03:22:36,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:36,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718342147] [2021-12-17 03:22:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:36,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:22:36,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718342147] [2021-12-17 03:22:36,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718342147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:36,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:36,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:36,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366838631] [2021-12-17 03:22:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:36,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:36,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:36,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:36,591 INFO L87 Difference]: Start difference. First operand 270 states and 417 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:37,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:37,851 INFO L93 Difference]: Finished difference Result 614 states and 952 transitions. [2021-12-17 03:22:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:37,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-17 03:22:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:37,853 INFO L225 Difference]: With dead ends: 614 [2021-12-17 03:22:37,853 INFO L226 Difference]: Without dead ends: 365 [2021-12-17 03:22:37,853 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 [2021-12-17 03:22:37,854 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 88 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:37,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 485 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:22:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-17 03:22:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 304. [2021-12-17 03:22:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.5544554455445545) internal successors, (471), 303 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 471 transitions. [2021-12-17 03:22:37,860 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 471 transitions. Word has length 114 [2021-12-17 03:22:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 471 transitions. [2021-12-17 03:22:37,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 471 transitions. [2021-12-17 03:22:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 03:22:37,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:37,861 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:37,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:22:37,862 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash -348224948, now seen corresponding path program 1 times [2021-12-17 03:22:37,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717432438] [2021-12-17 03:22:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:37,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:22:37,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717432438] [2021-12-17 03:22:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717432438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:37,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:37,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:37,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003426125] [2021-12-17 03:22:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:37,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:37,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:37,936 INFO L87 Difference]: Start difference. First operand 304 states and 471 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:38,913 INFO L93 Difference]: Finished difference Result 742 states and 1159 transitions. [2021-12-17 03:22:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:38,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-17 03:22:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:38,915 INFO L225 Difference]: With dead ends: 742 [2021-12-17 03:22:38,915 INFO L226 Difference]: Without dead ends: 459 [2021-12-17 03:22:38,915 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 [2021-12-17 03:22:38,916 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 127 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:38,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 368 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:22:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-17 03:22:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 334. [2021-12-17 03:22:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.5645645645645645) internal successors, (521), 333 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) [2021-12-17 03:22:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 521 transitions. [2021-12-17 03:22:38,922 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 521 transitions. Word has length 114 [2021-12-17 03:22:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:38,923 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 521 transitions. [2021-12-17 03:22:38,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 521 transitions. [2021-12-17 03:22:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 03:22:38,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:38,924 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:38,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:22:38,924 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1220823717, now seen corresponding path program 1 times [2021-12-17 03:22:38,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:38,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97989184] [2021-12-17 03:22:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:38,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:22:39,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:39,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97989184] [2021-12-17 03:22:39,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97989184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:39,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:39,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:39,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165682351] [2021-12-17 03:22:39,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:39,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:39,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:39,011 INFO L87 Difference]: Start difference. First operand 334 states and 521 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:40,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:40,635 INFO L93 Difference]: Finished difference Result 742 states and 1159 transitions. [2021-12-17 03:22:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2021-12-17 03:22:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:40,637 INFO L225 Difference]: With dead ends: 742 [2021-12-17 03:22:40,637 INFO L226 Difference]: Without dead ends: 429 [2021-12-17 03:22:40,638 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 [2021-12-17 03:22:40,638 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 82 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:40,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 489 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 03:22:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-12-17 03:22:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 373. [2021-12-17 03:22:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.5698924731182795) internal successors, (584), 372 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 584 transitions. [2021-12-17 03:22:40,645 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 584 transitions. Word has length 119 [2021-12-17 03:22:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:40,645 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 584 transitions. [2021-12-17 03:22:40,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 584 transitions. [2021-12-17 03:22:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 03:22:40,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:40,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:40,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:22:40,647 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash -856513181, now seen corresponding path program 1 times [2021-12-17 03:22:40,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:40,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943842239] [2021-12-17 03:22:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:40,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:22:40,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:40,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943842239] [2021-12-17 03:22:40,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943842239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:40,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:40,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:40,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255113657] [2021-12-17 03:22:40,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:40,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:40,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:40,771 INFO L87 Difference]: Start difference. First operand 373 states and 584 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:42,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:42,373 INFO L93 Difference]: Finished difference Result 844 states and 1321 transitions. [2021-12-17 03:22:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2021-12-17 03:22:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:42,375 INFO L225 Difference]: With dead ends: 844 [2021-12-17 03:22:42,375 INFO L226 Difference]: Without dead ends: 492 [2021-12-17 03:22:42,376 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 [2021-12-17 03:22:42,376 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 123 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:42,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 356 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 03:22:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-17 03:22:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 371. [2021-12-17 03:22:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.5702702702702702) internal successors, (581), 370 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 581 transitions. [2021-12-17 03:22:42,383 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 581 transitions. Word has length 119 [2021-12-17 03:22:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:42,383 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 581 transitions. [2021-12-17 03:22:42,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 581 transitions. [2021-12-17 03:22:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 03:22:42,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:42,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:42,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:22:42,385 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1048591620, now seen corresponding path program 1 times [2021-12-17 03:22:42,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:42,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217476344] [2021-12-17 03:22:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:42,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:22:42,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217476344] [2021-12-17 03:22:42,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217476344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:42,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:42,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:42,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418697156] [2021-12-17 03:22:42,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:42,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:42,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:42,456 INFO L87 Difference]: Start difference. First operand 371 states and 581 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:43,112 INFO L93 Difference]: Finished difference Result 814 states and 1276 transitions. [2021-12-17 03:22:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-17 03:22:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:43,114 INFO L225 Difference]: With dead ends: 814 [2021-12-17 03:22:43,114 INFO L226 Difference]: Without dead ends: 464 [2021-12-17 03:22:43,115 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 [2021-12-17 03:22:43,115 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 79 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:43,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 487 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:22:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-17 03:22:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 411. [2021-12-17 03:22:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.5731707317073171) internal successors, (645), 410 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 645 transitions. [2021-12-17 03:22:43,123 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 645 transitions. Word has length 120 [2021-12-17 03:22:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:43,123 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 645 transitions. [2021-12-17 03:22:43,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 645 transitions. [2021-12-17 03:22:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 03:22:43,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:43,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:43,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:22:43,125 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1021526018, now seen corresponding path program 1 times [2021-12-17 03:22:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645503452] [2021-12-17 03:22:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:43,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 03:22:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645503452] [2021-12-17 03:22:43,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645503452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:43,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:43,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:43,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679796343] [2021-12-17 03:22:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:43,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:43,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:43,202 INFO L87 Difference]: Start difference. First operand 411 states and 645 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:43,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:43,890 INFO L93 Difference]: Finished difference Result 847 states and 1331 transitions. [2021-12-17 03:22:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-17 03:22:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:43,892 INFO L225 Difference]: With dead ends: 847 [2021-12-17 03:22:43,892 INFO L226 Difference]: Without dead ends: 457 [2021-12-17 03:22:43,893 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 [2021-12-17 03:22:43,893 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 34 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:43,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 611 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:22:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-17 03:22:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 435. [2021-12-17 03:22:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.5691244239631337) internal successors, (681), 434 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 681 transitions. [2021-12-17 03:22:43,901 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 681 transitions. Word has length 120 [2021-12-17 03:22:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:43,901 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 681 transitions. [2021-12-17 03:22:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 681 transitions. [2021-12-17 03:22:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:22:43,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:43,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:43,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:22:43,903 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -909602799, now seen corresponding path program 1 times [2021-12-17 03:22:43,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124480189] [2021-12-17 03:22:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:43,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:22:43,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124480189] [2021-12-17 03:22:43,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124480189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:43,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:43,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721391016] [2021-12-17 03:22:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:43,996 INFO L87 Difference]: Start difference. First operand 435 states and 681 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:44,776 INFO L93 Difference]: Finished difference Result 893 states and 1396 transitions. [2021-12-17 03:22:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 03:22:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:44,778 INFO L225 Difference]: With dead ends: 893 [2021-12-17 03:22:44,778 INFO L226 Difference]: Without dead ends: 479 [2021-12-17 03:22:44,779 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 [2021-12-17 03:22:44,779 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 61 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:44,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 493 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:22:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-17 03:22:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 438. [2021-12-17 03:22:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.565217391304348) internal successors, (684), 437 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 684 transitions. [2021-12-17 03:22:44,786 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 684 transitions. Word has length 128 [2021-12-17 03:22:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:44,787 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 684 transitions. [2021-12-17 03:22:44,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 684 transitions. [2021-12-17 03:22:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 03:22:44,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:44,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:44,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:22:44,788 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1846542571, now seen corresponding path program 1 times [2021-12-17 03:22:44,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594764569] [2021-12-17 03:22:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:44,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:22:44,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594764569] [2021-12-17 03:22:44,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594764569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:44,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:44,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:44,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969403798] [2021-12-17 03:22:44,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:44,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:44,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:44,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:44,858 INFO L87 Difference]: Start difference. First operand 438 states and 684 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:45,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:46,238 INFO L93 Difference]: Finished difference Result 933 states and 1454 transitions. [2021-12-17 03:22:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 134 [2021-12-17 03:22:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:46,239 INFO L225 Difference]: With dead ends: 933 [2021-12-17 03:22:46,239 INFO L226 Difference]: Without dead ends: 516 [2021-12-17 03:22:46,240 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 [2021-12-17 03:22:46,240 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 142 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:46,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 358 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 03:22:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-17 03:22:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 438. [2021-12-17 03:22:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.5491990846681922) internal successors, (677), 437 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 677 transitions. [2021-12-17 03:22:46,247 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 677 transitions. Word has length 134 [2021-12-17 03:22:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:46,248 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 677 transitions. [2021-12-17 03:22:46,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 677 transitions. [2021-12-17 03:22:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 03:22:46,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:46,249 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:46,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:22:46,249 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -50542740, now seen corresponding path program 1 times [2021-12-17 03:22:46,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:46,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016166169] [2021-12-17 03:22:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:46,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 03:22:46,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016166169] [2021-12-17 03:22:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016166169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:46,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:22:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127840965] [2021-12-17 03:22:46,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:22:46,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:22:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:22:46,333 INFO L87 Difference]: Start difference. First operand 438 states and 677 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:47,751 INFO L93 Difference]: Finished difference Result 865 states and 1342 transitions. [2021-12-17 03:22:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:22:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-17 03:22:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:47,752 INFO L225 Difference]: With dead ends: 865 [2021-12-17 03:22:47,752 INFO L226 Difference]: Without dead ends: 448 [2021-12-17 03:22:47,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:22:47,754 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 153 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:47,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 384 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 03:22:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-17 03:22:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2021-12-17 03:22:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5426008968609866) internal successors, (688), 446 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 688 transitions. [2021-12-17 03:22:47,761 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 688 transitions. Word has length 135 [2021-12-17 03:22:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 688 transitions. [2021-12-17 03:22:47,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 688 transitions. [2021-12-17 03:22:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 03:22:47,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:47,762 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:47,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:22:47,763 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash 181553585, now seen corresponding path program 1 times [2021-12-17 03:22:47,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206064458] [2021-12-17 03:22:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:47,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:22:47,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206064458] [2021-12-17 03:22:47,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206064458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:47,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:47,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:47,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809009350] [2021-12-17 03:22:47,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:47,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:47,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:47,882 INFO L87 Difference]: Start difference. First operand 447 states and 688 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) [2021-12-17 03:22:49,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:49,581 INFO L93 Difference]: Finished difference Result 941 states and 1449 transitions. [2021-12-17 03:22:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:49,582 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 136 [2021-12-17 03:22:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:49,583 INFO L225 Difference]: With dead ends: 941 [2021-12-17 03:22:49,583 INFO L226 Difference]: Without dead ends: 515 [2021-12-17 03:22:49,584 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 [2021-12-17 03:22:49,584 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 139 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:49,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 406 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:22:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-17 03:22:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 447. [2021-12-17 03:22:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5246636771300448) internal successors, (680), 446 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 680 transitions. [2021-12-17 03:22:49,593 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 680 transitions. Word has length 136 [2021-12-17 03:22:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:49,593 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 680 transitions. [2021-12-17 03:22:49,593 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) [2021-12-17 03:22:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 680 transitions. [2021-12-17 03:22:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:22:49,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:49,595 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:22:49,595 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -655242258, now seen corresponding path program 1 times [2021-12-17 03:22:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25439960] [2021-12-17 03:22:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:49,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:22:49,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:49,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25439960] [2021-12-17 03:22:49,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25439960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:49,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:49,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:49,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715047769] [2021-12-17 03:22:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:49,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:49,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:49,666 INFO L87 Difference]: Start difference. First operand 447 states and 680 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:50,824 INFO L93 Difference]: Finished difference Result 981 states and 1496 transitions. [2021-12-17 03:22:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:50,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-17 03:22:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:50,826 INFO L225 Difference]: With dead ends: 981 [2021-12-17 03:22:50,826 INFO L226 Difference]: Without dead ends: 555 [2021-12-17 03:22:50,827 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 [2021-12-17 03:22:50,827 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 121 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:50,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 378 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:22:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-12-17 03:22:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 477. [2021-12-17 03:22:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5147058823529411) internal successors, (721), 476 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 721 transitions. [2021-12-17 03:22:50,835 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 721 transitions. Word has length 141 [2021-12-17 03:22:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:50,835 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 721 transitions. [2021-12-17 03:22:50,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 721 transitions. [2021-12-17 03:22:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:22:50,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:50,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:50,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:22:50,837 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1461975096, now seen corresponding path program 1 times [2021-12-17 03:22:50,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923405376] [2021-12-17 03:22:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:50,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:22:50,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:50,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923405376] [2021-12-17 03:22:50,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923405376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:50,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:50,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:50,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932723386] [2021-12-17 03:22:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:50,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:50,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:50,916 INFO L87 Difference]: Start difference. First operand 477 states and 721 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:52,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:52,281 INFO L93 Difference]: Finished difference Result 1001 states and 1515 transitions. [2021-12-17 03:22:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 03:22:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:52,283 INFO L225 Difference]: With dead ends: 1001 [2021-12-17 03:22:52,283 INFO L226 Difference]: Without dead ends: 545 [2021-12-17 03:22:52,283 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 [2021-12-17 03:22:52,284 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 127 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:52,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 416 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 03:22:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-12-17 03:22:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 477. [2021-12-17 03:22:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5) internal successors, (714), 476 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 714 transitions. [2021-12-17 03:22:52,292 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 714 transitions. Word has length 142 [2021-12-17 03:22:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:52,292 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 714 transitions. [2021-12-17 03:22:52,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 714 transitions. [2021-12-17 03:22:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:22:52,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:52,294 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:52,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:22:52,294 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2035167520, now seen corresponding path program 1 times [2021-12-17 03:22:52,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:52,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764064789] [2021-12-17 03:22:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:52,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:22:52,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764064789] [2021-12-17 03:22:52,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764064789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:52,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:52,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:52,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271011998] [2021-12-17 03:22:52,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:52,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:52,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:52,376 INFO L87 Difference]: Start difference. First operand 477 states and 714 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:54,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:54,308 INFO L93 Difference]: Finished difference Result 961 states and 1442 transitions. [2021-12-17 03:22:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 03:22:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:54,310 INFO L225 Difference]: With dead ends: 961 [2021-12-17 03:22:54,310 INFO L226 Difference]: Without dead ends: 505 [2021-12-17 03:22:54,311 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 [2021-12-17 03:22:54,311 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 58 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:54,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 523 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:22:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-17 03:22:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 477. [2021-12-17 03:22:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.4978991596638656) internal successors, (713), 476 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 713 transitions. [2021-12-17 03:22:54,318 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 713 transitions. Word has length 142 [2021-12-17 03:22:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:54,318 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 713 transitions. [2021-12-17 03:22:54,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 713 transitions. [2021-12-17 03:22:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:22:54,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:54,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:54,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:22:54,320 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1801951302, now seen corresponding path program 1 times [2021-12-17 03:22:54,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046658018] [2021-12-17 03:22:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:54,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 03:22:54,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:54,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046658018] [2021-12-17 03:22:54,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046658018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:54,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:54,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:54,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196706933] [2021-12-17 03:22:54,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:54,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:54,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:54,394 INFO L87 Difference]: Start difference. First operand 477 states and 713 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:55,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:55,903 INFO L93 Difference]: Finished difference Result 972 states and 1457 transitions. [2021-12-17 03:22:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 03:22:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:55,905 INFO L225 Difference]: With dead ends: 972 [2021-12-17 03:22:55,905 INFO L226 Difference]: Without dead ends: 516 [2021-12-17 03:22:55,906 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 [2021-12-17 03:22:55,906 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 27 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:55,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 597 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 03:22:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-17 03:22:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 503. [2021-12-17 03:22:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4940239043824701) internal successors, (750), 502 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 750 transitions. [2021-12-17 03:22:55,914 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 750 transitions. Word has length 142 [2021-12-17 03:22:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:55,914 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 750 transitions. [2021-12-17 03:22:55,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 750 transitions. [2021-12-17 03:22:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 03:22:55,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:55,916 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:55,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:22:55,916 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:55,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash -279960039, now seen corresponding path program 1 times [2021-12-17 03:22:55,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:55,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927304875] [2021-12-17 03:22:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:55,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:22:55,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927304875] [2021-12-17 03:22:55,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927304875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:55,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:55,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:55,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521834001] [2021-12-17 03:22:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:55,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:55,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:55,995 INFO L87 Difference]: Start difference. First operand 503 states and 750 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:57,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:57,262 INFO L93 Difference]: Finished difference Result 1013 states and 1514 transitions. [2021-12-17 03:22:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:57,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-17 03:22:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:57,266 INFO L225 Difference]: With dead ends: 1013 [2021-12-17 03:22:57,266 INFO L226 Difference]: Without dead ends: 531 [2021-12-17 03:22:57,267 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 [2021-12-17 03:22:57,267 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 60 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:57,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 523 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 03:22:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-17 03:22:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 503. [2021-12-17 03:22:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4920318725099602) internal successors, (749), 502 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 749 transitions. [2021-12-17 03:22:57,275 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 749 transitions. Word has length 144 [2021-12-17 03:22:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:57,275 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 749 transitions. [2021-12-17 03:22:57,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 749 transitions. [2021-12-17 03:22:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 03:22:57,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:57,276 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, 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] [2021-12-17 03:22:57,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:22:57,277 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash 504114503, now seen corresponding path program 1 times [2021-12-17 03:22:57,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:57,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364039009] [2021-12-17 03:22:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:57,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:22:57,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364039009] [2021-12-17 03:22:57,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364039009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:57,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:57,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:57,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080343404] [2021-12-17 03:22:57,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:57,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:57,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:57,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:57,359 INFO L87 Difference]: Start difference. First operand 503 states and 749 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:58,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:22:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:22:59,028 INFO L93 Difference]: Finished difference Result 1053 states and 1571 transitions. [2021-12-17 03:22:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:22:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-17 03:22:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:22:59,030 INFO L225 Difference]: With dead ends: 1053 [2021-12-17 03:22:59,030 INFO L226 Difference]: Without dead ends: 571 [2021-12-17 03:22:59,031 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 [2021-12-17 03:22:59,032 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 122 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:22:59,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 378 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:22:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-17 03:22:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 503. [2021-12-17 03:22:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4780876494023905) internal successors, (742), 502 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 742 transitions. [2021-12-17 03:22:59,039 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 742 transitions. Word has length 145 [2021-12-17 03:22:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:22:59,040 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 742 transitions. [2021-12-17 03:22:59,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:22:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 742 transitions. [2021-12-17 03:22:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-17 03:22:59,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:22:59,041 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:22:59,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:22:59,041 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:22:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:22:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 434884877, now seen corresponding path program 1 times [2021-12-17 03:22:59,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:22:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705736562] [2021-12-17 03:22:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:22:59,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:22:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:22:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:22:59,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:22:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705736562] [2021-12-17 03:22:59,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705736562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:22:59,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:22:59,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:22:59,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842913181] [2021-12-17 03:22:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:22:59,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:22:59,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:22:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:22:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:22:59,125 INFO L87 Difference]: Start difference. First operand 503 states and 742 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:00,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:00,525 INFO L93 Difference]: Finished difference Result 1005 states and 1485 transitions. [2021-12-17 03:23:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-17 03:23:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:00,527 INFO L225 Difference]: With dead ends: 1005 [2021-12-17 03:23:00,527 INFO L226 Difference]: Without dead ends: 523 [2021-12-17 03:23:00,527 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 [2021-12-17 03:23:00,528 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 51 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:00,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 541 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 03:23:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-17 03:23:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 503. [2021-12-17 03:23:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4760956175298805) internal successors, (741), 502 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 741 transitions. [2021-12-17 03:23:00,535 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 741 transitions. Word has length 148 [2021-12-17 03:23:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:00,535 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 741 transitions. [2021-12-17 03:23:00,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 741 transitions. [2021-12-17 03:23:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 03:23:00,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:00,537 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, 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] [2021-12-17 03:23:00,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:23:00,537 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1543581541, now seen corresponding path program 1 times [2021-12-17 03:23:00,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:00,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384645521] [2021-12-17 03:23:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:00,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:23:00,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:00,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384645521] [2021-12-17 03:23:00,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384645521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:00,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:00,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:00,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642316762] [2021-12-17 03:23:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:00,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:00,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:00,612 INFO L87 Difference]: Start difference. First operand 503 states and 741 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:01,616 INFO L93 Difference]: Finished difference Result 1053 states and 1555 transitions. [2021-12-17 03:23:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:01,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-17 03:23:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:01,618 INFO L225 Difference]: With dead ends: 1053 [2021-12-17 03:23:01,618 INFO L226 Difference]: Without dead ends: 571 [2021-12-17 03:23:01,618 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 [2021-12-17 03:23:01,619 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 123 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:01,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 378 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:23:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-17 03:23:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 503. [2021-12-17 03:23:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4621513944223108) internal successors, (734), 502 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 734 transitions. [2021-12-17 03:23:01,626 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 734 transitions. Word has length 149 [2021-12-17 03:23:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:01,626 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 734 transitions. [2021-12-17 03:23:01,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 734 transitions. [2021-12-17 03:23:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 03:23:01,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:01,628 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, 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] [2021-12-17 03:23:01,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:23:01,628 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash 323319001, now seen corresponding path program 1 times [2021-12-17 03:23:01,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:01,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292137304] [2021-12-17 03:23:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:01,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:23:01,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:01,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292137304] [2021-12-17 03:23:01,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292137304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:01,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:01,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:01,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215169902] [2021-12-17 03:23:01,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:01,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:01,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:01,700 INFO L87 Difference]: Start difference. First operand 503 states and 734 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:02,477 INFO L93 Difference]: Finished difference Result 1003 states and 1466 transitions. [2021-12-17 03:23:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-17 03:23:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:02,479 INFO L225 Difference]: With dead ends: 1003 [2021-12-17 03:23:02,479 INFO L226 Difference]: Without dead ends: 521 [2021-12-17 03:23:02,479 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 [2021-12-17 03:23:02,480 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 39 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:02,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 547 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:23:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-17 03:23:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 503. [2021-12-17 03:23:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4601593625498008) internal successors, (733), 502 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 733 transitions. [2021-12-17 03:23:02,487 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 733 transitions. Word has length 151 [2021-12-17 03:23:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:02,487 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 733 transitions. [2021-12-17 03:23:02,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 733 transitions. [2021-12-17 03:23:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 03:23:02,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:02,489 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, 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] [2021-12-17 03:23:02,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:23:02,489 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 790679231, now seen corresponding path program 1 times [2021-12-17 03:23:02,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:02,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099302643] [2021-12-17 03:23:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:02,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:23:02,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:02,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099302643] [2021-12-17 03:23:02,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099302643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:02,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:02,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:02,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906145159] [2021-12-17 03:23:02,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:02,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:02,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:02,569 INFO L87 Difference]: Start difference. First operand 503 states and 733 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:04,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:04,764 INFO L93 Difference]: Finished difference Result 1003 states and 1464 transitions. [2021-12-17 03:23:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 151 [2021-12-17 03:23:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:04,765 INFO L225 Difference]: With dead ends: 1003 [2021-12-17 03:23:04,765 INFO L226 Difference]: Without dead ends: 521 [2021-12-17 03:23:04,766 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 [2021-12-17 03:23:04,766 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 40 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:04,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 547 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-17 03:23:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 503. [2021-12-17 03:23:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4581673306772909) internal successors, (732), 502 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 732 transitions. [2021-12-17 03:23:04,774 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 732 transitions. Word has length 151 [2021-12-17 03:23:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:04,774 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 732 transitions. [2021-12-17 03:23:04,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 732 transitions. [2021-12-17 03:23:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 03:23:04,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:04,775 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, 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] [2021-12-17 03:23:04,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:23:04,775 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:04,775 INFO L85 PathProgramCache]: Analyzing trace with hash 308502998, now seen corresponding path program 1 times [2021-12-17 03:23:04,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:04,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70311779] [2021-12-17 03:23:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:04,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 03:23:04,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70311779] [2021-12-17 03:23:04,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70311779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:04,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:04,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:04,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826549864] [2021-12-17 03:23:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:04,874 INFO L87 Difference]: Start difference. First operand 503 states and 732 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:05,408 INFO L93 Difference]: Finished difference Result 999 states and 1457 transitions. [2021-12-17 03:23:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-17 03:23:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:05,410 INFO L225 Difference]: With dead ends: 999 [2021-12-17 03:23:05,410 INFO L226 Difference]: Without dead ends: 517 [2021-12-17 03:23:05,411 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 [2021-12-17 03:23:05,411 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 35 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:05,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 551 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:23:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-17 03:23:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 503. [2021-12-17 03:23:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.456175298804781) internal successors, (731), 502 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 731 transitions. [2021-12-17 03:23:05,419 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 731 transitions. Word has length 152 [2021-12-17 03:23:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:05,419 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 731 transitions. [2021-12-17 03:23:05,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 731 transitions. [2021-12-17 03:23:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 03:23:05,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:05,421 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, 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] [2021-12-17 03:23:05,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:23:05,421 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2006390928, now seen corresponding path program 1 times [2021-12-17 03:23:05,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:05,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484011375] [2021-12-17 03:23:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:05,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:23:05,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:05,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484011375] [2021-12-17 03:23:05,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484011375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:05,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:05,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:05,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381355866] [2021-12-17 03:23:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:05,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:05,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:05,496 INFO L87 Difference]: Start difference. First operand 503 states and 731 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:06,202 INFO L93 Difference]: Finished difference Result 1053 states and 1535 transitions. [2021-12-17 03:23:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-17 03:23:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:06,204 INFO L225 Difference]: With dead ends: 1053 [2021-12-17 03:23:06,204 INFO L226 Difference]: Without dead ends: 571 [2021-12-17 03:23:06,205 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 [2021-12-17 03:23:06,205 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 113 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:06,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 378 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:23:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-17 03:23:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 503. [2021-12-17 03:23:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.448207171314741) internal successors, (727), 502 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 727 transitions. [2021-12-17 03:23:06,213 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 727 transitions. Word has length 152 [2021-12-17 03:23:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:06,213 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 727 transitions. [2021-12-17 03:23:06,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 727 transitions. [2021-12-17 03:23:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 03:23:06,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:06,215 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, 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] [2021-12-17 03:23:06,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:23:06,215 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1989615445, now seen corresponding path program 1 times [2021-12-17 03:23:06,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:06,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001173006] [2021-12-17 03:23:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:06,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:23:06,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001173006] [2021-12-17 03:23:06,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001173006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:06,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:06,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:06,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110841556] [2021-12-17 03:23:06,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:06,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:06,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:06,292 INFO L87 Difference]: Start difference. First operand 503 states and 727 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:07,408 INFO L93 Difference]: Finished difference Result 1053 states and 1527 transitions. [2021-12-17 03:23:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 161 [2021-12-17 03:23:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:07,410 INFO L225 Difference]: With dead ends: 1053 [2021-12-17 03:23:07,410 INFO L226 Difference]: Without dead ends: 571 [2021-12-17 03:23:07,411 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 [2021-12-17 03:23:07,411 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 109 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:07,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 378 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:23:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-17 03:23:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 503. [2021-12-17 03:23:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4442231075697212) internal successors, (725), 502 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 725 transitions. [2021-12-17 03:23:07,419 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 725 transitions. Word has length 161 [2021-12-17 03:23:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:07,419 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 725 transitions. [2021-12-17 03:23:07,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 725 transitions. [2021-12-17 03:23:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-17 03:23:07,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:07,420 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, 1, 1, 1] [2021-12-17 03:23:07,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:23:07,420 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:07,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1274245440, now seen corresponding path program 1 times [2021-12-17 03:23:07,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:07,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969529799] [2021-12-17 03:23:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:07,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:23:07,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969529799] [2021-12-17 03:23:07,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969529799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:07,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:07,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:07,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69034966] [2021-12-17 03:23:07,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:07,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:07,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:07,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:07,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:07,496 INFO L87 Difference]: Start difference. First operand 503 states and 725 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:07,536 INFO L93 Difference]: Finished difference Result 1458 states and 2113 transitions. [2021-12-17 03:23:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-17 03:23:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:07,539 INFO L225 Difference]: With dead ends: 1458 [2021-12-17 03:23:07,539 INFO L226 Difference]: Without dead ends: 976 [2021-12-17 03:23:07,540 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 [2021-12-17 03:23:07,540 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:07,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 571 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-12-17 03:23:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 976. [2021-12-17 03:23:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.437948717948718) internal successors, (1402), 975 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1402 transitions. [2021-12-17 03:23:07,554 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1402 transitions. Word has length 169 [2021-12-17 03:23:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:07,555 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1402 transitions. [2021-12-17 03:23:07,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1402 transitions. [2021-12-17 03:23:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 03:23:07,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:07,556 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, 1, 1, 1, 1] [2021-12-17 03:23:07,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:23:07,556 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1177340101, now seen corresponding path program 1 times [2021-12-17 03:23:07,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:07,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500056639] [2021-12-17 03:23:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:07,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:23:07,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500056639] [2021-12-17 03:23:07,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500056639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:07,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:07,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:07,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127501526] [2021-12-17 03:23:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:07,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:07,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:07,640 INFO L87 Difference]: Start difference. First operand 976 states and 1402 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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) [2021-12-17 03:23:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:07,686 INFO L93 Difference]: Finished difference Result 2372 states and 3420 transitions. [2021-12-17 03:23:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:07,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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 170 [2021-12-17 03:23:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:07,690 INFO L225 Difference]: With dead ends: 2372 [2021-12-17 03:23:07,690 INFO L226 Difference]: Without dead ends: 1417 [2021-12-17 03:23:07,691 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 [2021-12-17 03:23:07,692 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:07,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 501 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-12-17 03:23:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1417. [2021-12-17 03:23:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.4350282485875707) internal successors, (2032), 1416 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2032 transitions. [2021-12-17 03:23:07,717 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2032 transitions. Word has length 170 [2021-12-17 03:23:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:07,717 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2032 transitions. [2021-12-17 03:23:07,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 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) [2021-12-17 03:23:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2032 transitions. [2021-12-17 03:23:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:23:07,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:07,719 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, 1, 1, 1, 1, 1] [2021-12-17 03:23:07,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:23:07,720 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2081013899, now seen corresponding path program 1 times [2021-12-17 03:23:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074803339] [2021-12-17 03:23:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:07,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 03:23:07,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074803339] [2021-12-17 03:23:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074803339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:07,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:07,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:07,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174850172] [2021-12-17 03:23:07,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:07,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:07,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:07,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:07,819 INFO L87 Difference]: Start difference. First operand 1417 states and 2032 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:07,873 INFO L93 Difference]: Finished difference Result 3288 states and 4730 transitions. [2021-12-17 03:23:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 171 [2021-12-17 03:23:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:07,878 INFO L225 Difference]: With dead ends: 3288 [2021-12-17 03:23:07,879 INFO L226 Difference]: Without dead ends: 1892 [2021-12-17 03:23:07,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:07,880 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 142 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:07,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 523 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-12-17 03:23:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1892. [2021-12-17 03:23:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 1.4341618191433103) internal successors, (2712), 1891 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2712 transitions. [2021-12-17 03:23:07,910 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2712 transitions. Word has length 171 [2021-12-17 03:23:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:07,910 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 2712 transitions. [2021-12-17 03:23:07,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2712 transitions. [2021-12-17 03:23:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:23:07,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:07,913 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, 1, 1, 1, 1, 1] [2021-12-17 03:23:07,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:23:07,913 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1405853773, now seen corresponding path program 1 times [2021-12-17 03:23:07,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:07,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330519498] [2021-12-17 03:23:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:07,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 03:23:08,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:08,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330519498] [2021-12-17 03:23:08,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330519498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:08,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:08,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:08,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036048095] [2021-12-17 03:23:08,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:08,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:08,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:08,004 INFO L87 Difference]: Start difference. First operand 1892 states and 2712 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:08,048 INFO L93 Difference]: Finished difference Result 3790 states and 5436 transitions. [2021-12-17 03:23:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:08,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-12-17 03:23:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:08,053 INFO L225 Difference]: With dead ends: 3790 [2021-12-17 03:23:08,053 INFO L226 Difference]: Without dead ends: 1919 [2021-12-17 03:23:08,055 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 [2021-12-17 03:23:08,056 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:08,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 418 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-12-17 03:23:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1919. [2021-12-17 03:23:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 1.432221063607925) internal successors, (2747), 1918 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2747 transitions. [2021-12-17 03:23:08,085 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2747 transitions. Word has length 171 [2021-12-17 03:23:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:08,085 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 2747 transitions. [2021-12-17 03:23:08,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2747 transitions. [2021-12-17 03:23:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:23:08,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:08,088 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, 1, 1, 1, 1, 1] [2021-12-17 03:23:08,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:23:08,089 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1965946097, now seen corresponding path program 1 times [2021-12-17 03:23:08,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:08,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124303980] [2021-12-17 03:23:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:08,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 03:23:08,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124303980] [2021-12-17 03:23:08,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124303980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:08,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:08,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:08,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493731360] [2021-12-17 03:23:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:08,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:08,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:08,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:08,175 INFO L87 Difference]: Start difference. First operand 1919 states and 2747 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) [2021-12-17 03:23:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:08,223 INFO L93 Difference]: Finished difference Result 3819 states and 5472 transitions. [2021-12-17 03:23:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:08,223 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 171 [2021-12-17 03:23:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:08,228 INFO L225 Difference]: With dead ends: 3819 [2021-12-17 03:23:08,228 INFO L226 Difference]: Without dead ends: 1921 [2021-12-17 03:23:08,230 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 [2021-12-17 03:23:08,230 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:08,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 397 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-12-17 03:23:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1921. [2021-12-17 03:23:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4317708333333334) internal successors, (2749), 1920 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2749 transitions. [2021-12-17 03:23:08,263 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2749 transitions. Word has length 171 [2021-12-17 03:23:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:08,263 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 2749 transitions. [2021-12-17 03:23:08,263 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) [2021-12-17 03:23:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2749 transitions. [2021-12-17 03:23:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-17 03:23:08,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:08,266 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, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:08,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:23:08,266 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1971855452, now seen corresponding path program 1 times [2021-12-17 03:23:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955789982] [2021-12-17 03:23:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:08,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-17 03:23:08,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955789982] [2021-12-17 03:23:08,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955789982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:08,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:08,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:08,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608911787] [2021-12-17 03:23:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:08,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:08,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:08,384 INFO L87 Difference]: Start difference. First operand 1921 states and 2749 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:08,450 INFO L93 Difference]: Finished difference Result 4299 states and 6170 transitions. [2021-12-17 03:23:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-12-17 03:23:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:08,467 INFO L225 Difference]: With dead ends: 4299 [2021-12-17 03:23:08,468 INFO L226 Difference]: Without dead ends: 2401 [2021-12-17 03:23:08,470 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 [2021-12-17 03:23:08,470 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 155 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:08,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 378 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-12-17 03:23:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2401. [2021-12-17 03:23:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2400 states have (on average 1.4333333333333333) internal successors, (3440), 2400 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3440 transitions. [2021-12-17 03:23:08,523 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3440 transitions. Word has length 252 [2021-12-17 03:23:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:08,524 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 3440 transitions. [2021-12-17 03:23:08,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3440 transitions. [2021-12-17 03:23:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-17 03:23:08,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:08,528 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:08,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:23:08,528 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1276348089, now seen corresponding path program 1 times [2021-12-17 03:23:08,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:08,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665432642] [2021-12-17 03:23:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:08,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-17 03:23:08,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:08,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665432642] [2021-12-17 03:23:08,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665432642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:08,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:08,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:08,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569452931] [2021-12-17 03:23:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:08,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:08,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:08,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:08,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:08,646 INFO L87 Difference]: Start difference. First operand 2401 states and 3440 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:09,816 INFO L93 Difference]: Finished difference Result 5176 states and 7404 transitions. [2021-12-17 03:23:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 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 294 [2021-12-17 03:23:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:09,821 INFO L225 Difference]: With dead ends: 5176 [2021-12-17 03:23:09,821 INFO L226 Difference]: Without dead ends: 2798 [2021-12-17 03:23:09,823 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 [2021-12-17 03:23:09,824 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 61 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:09,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 649 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:23:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-17 03:23:09,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2606. [2021-12-17 03:23:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.4318618042226487) internal successors, (3730), 2605 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3730 transitions. [2021-12-17 03:23:09,864 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3730 transitions. Word has length 294 [2021-12-17 03:23:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:09,865 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3730 transitions. [2021-12-17 03:23:09,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3730 transitions. [2021-12-17 03:23:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-17 03:23:09,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:09,869 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:09,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:23:09,869 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:09,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1861119739, now seen corresponding path program 1 times [2021-12-17 03:23:09,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:09,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868044580] [2021-12-17 03:23:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:09,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-12-17 03:23:09,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868044580] [2021-12-17 03:23:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868044580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:09,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:09,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083379356] [2021-12-17 03:23:09,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:09,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:09,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:09,999 INFO L87 Difference]: Start difference. First operand 2606 states and 3730 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:10,061 INFO L93 Difference]: Finished difference Result 5704 states and 8181 transitions. [2021-12-17 03:23:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-12-17 03:23:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:10,067 INFO L225 Difference]: With dead ends: 5704 [2021-12-17 03:23:10,067 INFO L226 Difference]: Without dead ends: 3121 [2021-12-17 03:23:10,069 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 [2021-12-17 03:23:10,069 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:10,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 577 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-12-17 03:23:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 3121. [2021-12-17 03:23:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.4314102564102564) internal successors, (4466), 3120 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4466 transitions. [2021-12-17 03:23:10,136 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4466 transitions. Word has length 294 [2021-12-17 03:23:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:10,137 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 4466 transitions. [2021-12-17 03:23:10,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4466 transitions. [2021-12-17 03:23:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-17 03:23:10,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:10,140 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:10,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:23:10,141 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1275890801, now seen corresponding path program 1 times [2021-12-17 03:23:10,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:10,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287503767] [2021-12-17 03:23:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:10,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-17 03:23:10,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:10,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287503767] [2021-12-17 03:23:10,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287503767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:10,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:10,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:10,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974847090] [2021-12-17 03:23:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:10,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:10,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:10,243 INFO L87 Difference]: Start difference. First operand 3121 states and 4466 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:10,340 INFO L93 Difference]: Finished difference Result 6702 states and 9606 transitions. [2021-12-17 03:23:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2021-12-17 03:23:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:10,346 INFO L225 Difference]: With dead ends: 6702 [2021-12-17 03:23:10,346 INFO L226 Difference]: Without dead ends: 3604 [2021-12-17 03:23:10,349 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 [2021-12-17 03:23:10,349 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:10,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 577 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-12-17 03:23:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3604. [2021-12-17 03:23:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 1.43075215098529) internal successors, (5155), 3603 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5155 transitions. [2021-12-17 03:23:10,407 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5155 transitions. Word has length 295 [2021-12-17 03:23:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:10,408 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 5155 transitions. [2021-12-17 03:23:10,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5155 transitions. [2021-12-17 03:23:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-12-17 03:23:10,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:10,413 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:10,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:23:10,413 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 103275167, now seen corresponding path program 1 times [2021-12-17 03:23:10,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:10,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997794366] [2021-12-17 03:23:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:10,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-17 03:23:10,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997794366] [2021-12-17 03:23:10,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997794366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:10,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:10,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:10,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788835745] [2021-12-17 03:23:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:10,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:10,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:10,556 INFO L87 Difference]: Start difference. First operand 3604 states and 5155 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:10,631 INFO L93 Difference]: Finished difference Result 7706 states and 11040 transitions. [2021-12-17 03:23:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 379 [2021-12-17 03:23:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:10,637 INFO L225 Difference]: With dead ends: 7706 [2021-12-17 03:23:10,638 INFO L226 Difference]: Without dead ends: 4125 [2021-12-17 03:23:10,641 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 [2021-12-17 03:23:10,641 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 154 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:10,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 375 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-12-17 03:23:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 4125. [2021-12-17 03:23:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4125 states, 4124 states have (on average 1.4323472356935014) internal successors, (5907), 4124 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4125 states to 4125 states and 5907 transitions. [2021-12-17 03:23:10,719 INFO L78 Accepts]: Start accepts. Automaton has 4125 states and 5907 transitions. Word has length 379 [2021-12-17 03:23:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:10,719 INFO L470 AbstractCegarLoop]: Abstraction has 4125 states and 5907 transitions. [2021-12-17 03:23:10,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4125 states and 5907 transitions. [2021-12-17 03:23:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-12-17 03:23:10,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:10,725 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 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] [2021-12-17 03:23:10,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:23:10,725 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -277813791, now seen corresponding path program 1 times [2021-12-17 03:23:10,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603775385] [2021-12-17 03:23:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:10,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2021-12-17 03:23:10,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:10,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603775385] [2021-12-17 03:23:10,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603775385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:10,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:10,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:10,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227077058] [2021-12-17 03:23:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:10,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:10,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:10,864 INFO L87 Difference]: Start difference. First operand 4125 states and 5907 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:10,976 INFO L93 Difference]: Finished difference Result 8743 states and 12537 transitions. [2021-12-17 03:23:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 422 [2021-12-17 03:23:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:10,984 INFO L225 Difference]: With dead ends: 8743 [2021-12-17 03:23:10,984 INFO L226 Difference]: Without dead ends: 4641 [2021-12-17 03:23:10,987 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 [2021-12-17 03:23:10,988 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:10,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 577 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:23:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-12-17 03:23:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4641. [2021-12-17 03:23:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 1.431896551724138) internal successors, (6644), 4640 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 6644 transitions. [2021-12-17 03:23:11,078 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 6644 transitions. Word has length 422 [2021-12-17 03:23:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:11,079 INFO L470 AbstractCegarLoop]: Abstraction has 4641 states and 6644 transitions. [2021-12-17 03:23:11,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 6644 transitions. [2021-12-17 03:23:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-17 03:23:11,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:11,086 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 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] [2021-12-17 03:23:11,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 03:23:11,086 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2009734672, now seen corresponding path program 1 times [2021-12-17 03:23:11,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:11,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519883483] [2021-12-17 03:23:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:11,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2021-12-17 03:23:11,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519883483] [2021-12-17 03:23:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519883483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:11,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:11,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:11,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984066043] [2021-12-17 03:23:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:11,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:11,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:11,237 INFO L87 Difference]: Start difference. First operand 4641 states and 6644 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:11,341 INFO L93 Difference]: Finished difference Result 9743 states and 13964 transitions. [2021-12-17 03:23:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:11,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 423 [2021-12-17 03:23:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:11,349 INFO L225 Difference]: With dead ends: 9743 [2021-12-17 03:23:11,349 INFO L226 Difference]: Without dead ends: 5125 [2021-12-17 03:23:11,354 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 [2021-12-17 03:23:11,354 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:11,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 577 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5125 states. [2021-12-17 03:23:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5125 to 5125. [2021-12-17 03:23:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 1.431303669008587) internal successors, (7334), 5124 states have internal predecessors, (7334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 7334 transitions. [2021-12-17 03:23:11,444 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 7334 transitions. Word has length 423 [2021-12-17 03:23:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:11,445 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 7334 transitions. [2021-12-17 03:23:11,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 7334 transitions. [2021-12-17 03:23:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-17 03:23:11,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:11,452 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:11,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 03:23:11,453 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash -61188847, now seen corresponding path program 1 times [2021-12-17 03:23:11,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:11,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849867543] [2021-12-17 03:23:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:11,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2318 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2021-12-17 03:23:11,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849867543] [2021-12-17 03:23:11,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849867543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:11,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:11,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:23:11,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420881922] [2021-12-17 03:23:11,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:11,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:23:11,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:23:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:23:11,636 INFO L87 Difference]: Start difference. First operand 5125 states and 7334 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:11,730 INFO L93 Difference]: Finished difference Result 10748 states and 15398 transitions. [2021-12-17 03:23:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:23:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 509 [2021-12-17 03:23:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:11,738 INFO L225 Difference]: With dead ends: 10748 [2021-12-17 03:23:11,738 INFO L226 Difference]: Without dead ends: 5646 [2021-12-17 03:23:11,743 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 [2021-12-17 03:23:11,744 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 153 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:11,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 372 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:23:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-12-17 03:23:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 5646. [2021-12-17 03:23:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 5645 states have (on average 1.4329495128432241) internal successors, (8089), 5645 states have internal predecessors, (8089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 8089 transitions. [2021-12-17 03:23:11,824 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 8089 transitions. Word has length 509 [2021-12-17 03:23:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:11,825 INFO L470 AbstractCegarLoop]: Abstraction has 5646 states and 8089 transitions. [2021-12-17 03:23:11,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 8089 transitions. [2021-12-17 03:23:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2021-12-17 03:23:11,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:11,833 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:11,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:23:11,833 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash 600999647, now seen corresponding path program 1 times [2021-12-17 03:23:11,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:11,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692077365] [2021-12-17 03:23:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:11,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1400 proven. 48 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-12-17 03:23:12,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692077365] [2021-12-17 03:23:12,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692077365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:23:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116896269] [2021-12-17 03:23:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:12,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:23:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:23:12,193 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) [2021-12-17 03:23:12,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:23:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 03:23:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:23:13,287 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:23:13,288 INFO L388 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 [2021-12-17 03:23:13,376 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-17 03:23:13,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-17 03:23:13,584 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:23:13,584 INFO L388 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 [2021-12-17 03:23:13,691 INFO L388 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 [2021-12-17 03:23:13,721 INFO L388 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 31 treesize of output 19 [2021-12-17 03:23:13,724 INFO L388 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 13 [2021-12-17 03:23:13,757 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-12-17 03:23:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 55 [2021-12-17 03:23:13,823 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-17 03:23:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-12-17 03:23:14,077 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:23:14,078 INFO L388 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 29 treesize of output 11 [2021-12-17 03:23:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1698 proven. 126 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2021-12-17 03:23:14,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:23:14,914 INFO L388 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 77 treesize of output 53 [2021-12-17 03:23:14,916 INFO L388 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 53 treesize of output 41 [2021-12-17 03:23:16,374 INFO L388 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 195 treesize of output 189 [2021-12-17 03:23:16,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:23:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1696 proven. 0 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-12-17 03:23:16,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116896269] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:23:16,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:23:16,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 14] total 20 [2021-12-17 03:23:16,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543803165] [2021-12-17 03:23:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:16,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:23:16,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:23:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:23:16,579 INFO L87 Difference]: Start difference. First operand 5646 states and 8089 transitions. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:19,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:21,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:26,432 INFO L93 Difference]: Finished difference Result 14498 states and 20767 transitions. [2021-12-17 03:23:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:23:26,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 553 [2021-12-17 03:23:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:26,446 INFO L225 Difference]: With dead ends: 14498 [2021-12-17 03:23:26,447 INFO L226 Difference]: Without dead ends: 8875 [2021-12-17 03:23:26,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1095 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-12-17 03:23:26,454 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 251 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 79 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:26,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1003 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 629 Invalid, 2 Unknown, 261 Unchecked, 5.6s Time] [2021-12-17 03:23:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2021-12-17 03:23:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 7588. [2021-12-17 03:23:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7588 states, 7587 states have (on average 1.4457624884671147) internal successors, (10969), 7587 states have internal predecessors, (10969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7588 states to 7588 states and 10969 transitions. [2021-12-17 03:23:26,622 INFO L78 Accepts]: Start accepts. Automaton has 7588 states and 10969 transitions. Word has length 553 [2021-12-17 03:23:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:26,623 INFO L470 AbstractCegarLoop]: Abstraction has 7588 states and 10969 transitions. [2021-12-17 03:23:26,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7588 states and 10969 transitions. [2021-12-17 03:23:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2021-12-17 03:23:26,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:26,636 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:26,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:23:26,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:23:26,853 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2030253142, now seen corresponding path program 1 times [2021-12-17 03:23:26,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:26,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836714478] [2021-12-17 03:23:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:26,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 1532 proven. 0 refuted. 0 times theorem prover too weak. 1235 trivial. 0 not checked. [2021-12-17 03:23:27,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:27,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836714478] [2021-12-17 03:23:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836714478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:27,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:27,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:27,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943710154] [2021-12-17 03:23:27,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:27,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:27,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:27,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:27,056 INFO L87 Difference]: Start difference. First operand 7588 states and 10969 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:28,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:29,358 INFO L93 Difference]: Finished difference Result 15709 states and 22659 transitions. [2021-12-17 03:23:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:29,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 556 [2021-12-17 03:23:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:29,370 INFO L225 Difference]: With dead ends: 15709 [2021-12-17 03:23:29,370 INFO L226 Difference]: Without dead ends: 8144 [2021-12-17 03:23:29,377 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 [2021-12-17 03:23:29,378 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 59 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:29,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 647 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8144 states. [2021-12-17 03:23:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8144 to 7599. [2021-12-17 03:23:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7599 states, 7598 states have (on average 1.4451171360884443) internal successors, (10980), 7598 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7599 states to 7599 states and 10980 transitions. [2021-12-17 03:23:29,583 INFO L78 Accepts]: Start accepts. Automaton has 7599 states and 10980 transitions. Word has length 556 [2021-12-17 03:23:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:29,584 INFO L470 AbstractCegarLoop]: Abstraction has 7599 states and 10980 transitions. [2021-12-17 03:23:29,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7599 states and 10980 transitions. [2021-12-17 03:23:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2021-12-17 03:23:29,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:29,598 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:29,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 03:23:29,599 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash 104446311, now seen corresponding path program 1 times [2021-12-17 03:23:29,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:29,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361332717] [2021-12-17 03:23:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:29,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3529 backedges. 1681 proven. 0 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2021-12-17 03:23:29,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361332717] [2021-12-17 03:23:29,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361332717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:29,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:29,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:29,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967550738] [2021-12-17 03:23:29,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:29,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:29,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:29,772 INFO L87 Difference]: Start difference. First operand 7599 states and 10980 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:31,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:32,153 INFO L93 Difference]: Finished difference Result 15720 states and 22659 transitions. [2021-12-17 03:23:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 619 [2021-12-17 03:23:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:32,164 INFO L225 Difference]: With dead ends: 15720 [2021-12-17 03:23:32,164 INFO L226 Difference]: Without dead ends: 8144 [2021-12-17 03:23:32,173 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 [2021-12-17 03:23:32,174 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 78 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:32,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 645 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8144 states. [2021-12-17 03:23:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8144 to 7599. [2021-12-17 03:23:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7599 states, 7598 states have (on average 1.4430113187680969) internal successors, (10964), 7598 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7599 states to 7599 states and 10964 transitions. [2021-12-17 03:23:32,306 INFO L78 Accepts]: Start accepts. Automaton has 7599 states and 10964 transitions. Word has length 619 [2021-12-17 03:23:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:32,307 INFO L470 AbstractCegarLoop]: Abstraction has 7599 states and 10964 transitions. [2021-12-17 03:23:32,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7599 states and 10964 transitions. [2021-12-17 03:23:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2021-12-17 03:23:32,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:32,317 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:32,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 03:23:32,317 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1851564773, now seen corresponding path program 1 times [2021-12-17 03:23:32,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:32,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177169957] [2021-12-17 03:23:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:32,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 1701 proven. 0 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2021-12-17 03:23:32,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177169957] [2021-12-17 03:23:32,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177169957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:32,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:32,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:32,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360711665] [2021-12-17 03:23:32,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:32,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:32,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:32,534 INFO L87 Difference]: Start difference. First operand 7599 states and 10964 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:33,887 INFO L93 Difference]: Finished difference Result 15656 states and 22539 transitions. [2021-12-17 03:23:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 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 622 [2021-12-17 03:23:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:33,896 INFO L225 Difference]: With dead ends: 15656 [2021-12-17 03:23:33,896 INFO L226 Difference]: Without dead ends: 8080 [2021-12-17 03:23:33,903 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 [2021-12-17 03:23:33,903 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 72 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:33,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 637 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:23:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-12-17 03:23:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7599. [2021-12-17 03:23:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7599 states, 7598 states have (on average 1.4409055014477494) internal successors, (10948), 7598 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7599 states to 7599 states and 10948 transitions. [2021-12-17 03:23:34,033 INFO L78 Accepts]: Start accepts. Automaton has 7599 states and 10948 transitions. Word has length 622 [2021-12-17 03:23:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:34,034 INFO L470 AbstractCegarLoop]: Abstraction has 7599 states and 10948 transitions. [2021-12-17 03:23:34,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 7599 states and 10948 transitions. [2021-12-17 03:23:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-12-17 03:23:34,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:34,043 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:34,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 03:23:34,044 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash 392632521, now seen corresponding path program 1 times [2021-12-17 03:23:34,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727031930] [2021-12-17 03:23:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:34,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 2024 proven. 98 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-12-17 03:23:34,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727031930] [2021-12-17 03:23:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727031930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:23:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796735770] [2021-12-17 03:23:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:34,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:23:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:23:34,232 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) [2021-12-17 03:23:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:23:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 03:23:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:23:35,531 INFO L388 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 31 treesize of output 19 [2021-12-17 03:23:35,547 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-17 03:23:35,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-17 03:23:35,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-12-17 03:23:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-12-17 03:23:35,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-17 03:23:35,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 3 [2021-12-17 03:23:35,638 INFO L388 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 9 treesize of output 3 [2021-12-17 03:23:35,712 INFO L388 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 [2021-12-17 03:23:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 2021 proven. 0 refuted. 0 times theorem prover too weak. 1718 trivial. 0 not checked. [2021-12-17 03:23:36,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:23:36,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796735770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:36,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:23:36,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-17 03:23:36,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358417803] [2021-12-17 03:23:36,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:36,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:36,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:23:36,135 INFO L87 Difference]: Start difference. First operand 7599 states and 10948 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:37,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:37,702 INFO L93 Difference]: Finished difference Result 15717 states and 22605 transitions. [2021-12-17 03:23:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 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 628 [2021-12-17 03:23:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:37,712 INFO L225 Difference]: With dead ends: 15717 [2021-12-17 03:23:37,712 INFO L226 Difference]: Without dead ends: 8141 [2021-12-17 03:23:37,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:23:37,718 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 62 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:37,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 651 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 03:23:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8141 states. [2021-12-17 03:23:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8141 to 7720. [2021-12-17 03:23:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7720 states, 7719 states have (on average 1.4396942609146262) internal successors, (11113), 7719 states have internal predecessors, (11113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7720 states to 7720 states and 11113 transitions. [2021-12-17 03:23:37,850 INFO L78 Accepts]: Start accepts. Automaton has 7720 states and 11113 transitions. Word has length 628 [2021-12-17 03:23:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:37,850 INFO L470 AbstractCegarLoop]: Abstraction has 7720 states and 11113 transitions. [2021-12-17 03:23:37,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7720 states and 11113 transitions. [2021-12-17 03:23:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2021-12-17 03:23:37,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:37,860 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:37,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:23:38,060 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,SelfDestructingSolverStorable54 [2021-12-17 03:23:38,060 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1573662244, now seen corresponding path program 1 times [2021-12-17 03:23:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186829904] [2021-12-17 03:23:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:38,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3754 backedges. 1942 proven. 0 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2021-12-17 03:23:38,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:38,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186829904] [2021-12-17 03:23:38,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186829904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:38,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:38,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:38,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111289476] [2021-12-17 03:23:38,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:38,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:38,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:38,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:38,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:38,249 INFO L87 Difference]: Start difference. First operand 7720 states and 11113 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:39,351 INFO L93 Difference]: Finished difference Result 15550 states and 22384 transitions. [2021-12-17 03:23:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 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 631 [2021-12-17 03:23:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:39,359 INFO L225 Difference]: With dead ends: 15550 [2021-12-17 03:23:39,359 INFO L226 Difference]: Without dead ends: 7853 [2021-12-17 03:23:39,365 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 [2021-12-17 03:23:39,366 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 39 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:39,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 610 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:23:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2021-12-17 03:23:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7599. [2021-12-17 03:23:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7599 states, 7598 states have (on average 1.4394577520400105) internal successors, (10937), 7598 states have internal predecessors, (10937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7599 states to 7599 states and 10937 transitions. [2021-12-17 03:23:39,506 INFO L78 Accepts]: Start accepts. Automaton has 7599 states and 10937 transitions. Word has length 631 [2021-12-17 03:23:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:39,507 INFO L470 AbstractCegarLoop]: Abstraction has 7599 states and 10937 transitions. [2021-12-17 03:23:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 7599 states and 10937 transitions. [2021-12-17 03:23:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2021-12-17 03:23:39,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:39,515 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:23:39,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 03:23:39,515 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1082318286, now seen corresponding path program 1 times [2021-12-17 03:23:39,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:39,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028634863] [2021-12-17 03:23:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:39,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 1998 proven. 90 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2021-12-17 03:23:39,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:39,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028634863] [2021-12-17 03:23:39,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028634863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:23:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332107756] [2021-12-17 03:23:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:39,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:23:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:23:39,695 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) [2021-12-17 03:23:39,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:23:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 03:23:40,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:23:40,810 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:23:40,811 INFO L388 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 [2021-12-17 03:23:40,844 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:23:40,844 INFO L388 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 [2021-12-17 03:23:40,905 INFO L388 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 [2021-12-17 03:23:41,037 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:23:41,038 INFO L388 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 [2021-12-17 03:23:41,110 INFO L388 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 [2021-12-17 03:23:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 1974 proven. 120 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2021-12-17 03:23:41,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:23:42,120 INFO L388 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 [2021-12-17 03:23:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3676 backedges. 1993 proven. 0 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2021-12-17 03:23:42,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332107756] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:23:42,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:23:42,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 12 [2021-12-17 03:23:42,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348637994] [2021-12-17 03:23:42,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:42,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:42,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:42,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:42,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:23:42,269 INFO L87 Difference]: Start difference. First operand 7599 states and 10937 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:43,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:44,049 INFO L93 Difference]: Finished difference Result 16149 states and 23179 transitions. [2021-12-17 03:23:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:44,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 637 [2021-12-17 03:23:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:44,061 INFO L225 Difference]: With dead ends: 16149 [2021-12-17 03:23:44,061 INFO L226 Difference]: Without dead ends: 8573 [2021-12-17 03:23:44,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 1269 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:23:44,068 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 106 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:44,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 427 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 03:23:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8573 states. [2021-12-17 03:23:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8573 to 7610. [2021-12-17 03:23:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7610 states, 7609 states have (on average 1.4388224471021158) internal successors, (10948), 7609 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7610 states to 7610 states and 10948 transitions. [2021-12-17 03:23:44,194 INFO L78 Accepts]: Start accepts. Automaton has 7610 states and 10948 transitions. Word has length 637 [2021-12-17 03:23:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 7610 states and 10948 transitions. [2021-12-17 03:23:44,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7610 states and 10948 transitions. [2021-12-17 03:23:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-17 03:23:44,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:44,204 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:44,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 03:23:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:23:44,416 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1689715661, now seen corresponding path program 1 times [2021-12-17 03:23:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:44,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882145222] [2021-12-17 03:23:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:44,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1991 proven. 0 refuted. 0 times theorem prover too weak. 1904 trivial. 0 not checked. [2021-12-17 03:23:44,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:44,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882145222] [2021-12-17 03:23:44,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882145222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:44,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:44,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:23:44,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245413920] [2021-12-17 03:23:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:44,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:23:44,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:23:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:44,698 INFO L87 Difference]: Start difference. First operand 7610 states and 10948 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:45,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:47,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:48,870 INFO L93 Difference]: Finished difference Result 22089 states and 31721 transitions. [2021-12-17 03:23:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 03:23:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 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 640 [2021-12-17 03:23:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:48,885 INFO L225 Difference]: With dead ends: 22089 [2021-12-17 03:23:48,885 INFO L226 Difference]: Without dead ends: 14502 [2021-12-17 03:23:48,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:23:48,899 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 247 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:48,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 1102 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 660 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-12-17 03:23:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2021-12-17 03:23:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 8872. [2021-12-17 03:23:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8872 states, 8871 states have (on average 1.4372675008454514) internal successors, (12750), 8871 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 12750 transitions. [2021-12-17 03:23:49,073 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 12750 transitions. Word has length 640 [2021-12-17 03:23:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:49,073 INFO L470 AbstractCegarLoop]: Abstraction has 8872 states and 12750 transitions. [2021-12-17 03:23:49,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 12750 transitions. [2021-12-17 03:23:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-17 03:23:49,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:49,084 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:49,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-17 03:23:49,085 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1862113509, now seen corresponding path program 1 times [2021-12-17 03:23:49,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:49,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250159943] [2021-12-17 03:23:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:49,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1898 proven. 0 refuted. 0 times theorem prover too weak. 1793 trivial. 0 not checked. [2021-12-17 03:23:49,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250159943] [2021-12-17 03:23:49,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250159943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:49,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:49,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:49,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760643821] [2021-12-17 03:23:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:49,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:49,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:49,260 INFO L87 Difference]: Start difference. First operand 8872 states and 12750 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:51,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:51,571 INFO L93 Difference]: Finished difference Result 18654 states and 26821 transitions. [2021-12-17 03:23:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 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 640 [2021-12-17 03:23:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:51,582 INFO L225 Difference]: With dead ends: 18654 [2021-12-17 03:23:51,582 INFO L226 Difference]: Without dead ends: 9805 [2021-12-17 03:23:51,588 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 [2021-12-17 03:23:51,589 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 37 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:51,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 607 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2021-12-17 03:23:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9404. [2021-12-17 03:23:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9404 states, 9403 states have (on average 1.4367754971817506) internal successors, (13510), 9403 states have internal predecessors, (13510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9404 states to 9404 states and 13510 transitions. [2021-12-17 03:23:51,794 INFO L78 Accepts]: Start accepts. Automaton has 9404 states and 13510 transitions. Word has length 640 [2021-12-17 03:23:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 9404 states and 13510 transitions. [2021-12-17 03:23:51,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9404 states and 13510 transitions. [2021-12-17 03:23:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-17 03:23:51,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:51,804 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:51,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-17 03:23:51,804 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 819285376, now seen corresponding path program 1 times [2021-12-17 03:23:51,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554670991] [2021-12-17 03:23:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:51,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3871 backedges. 2015 proven. 0 refuted. 0 times theorem prover too weak. 1856 trivial. 0 not checked. [2021-12-17 03:23:51,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554670991] [2021-12-17 03:23:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554670991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:51,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:51,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:51,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709101296] [2021-12-17 03:23:51,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:51,973 INFO L87 Difference]: Start difference. First operand 9404 states and 13510 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:53,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:54,358 INFO L93 Difference]: Finished difference Result 19889 states and 28569 transitions. [2021-12-17 03:23:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:54,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 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 640 [2021-12-17 03:23:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:54,371 INFO L225 Difference]: With dead ends: 19889 [2021-12-17 03:23:54,371 INFO L226 Difference]: Without dead ends: 10508 [2021-12-17 03:23:54,379 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 [2021-12-17 03:23:54,379 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 41 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:54,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 602 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10508 states. [2021-12-17 03:23:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10508 to 10012. [2021-12-17 03:23:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 10011 states have (on average 1.4368194985515932) internal successors, (14384), 10011 states have internal predecessors, (14384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 14384 transitions. [2021-12-17 03:23:54,559 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 14384 transitions. Word has length 640 [2021-12-17 03:23:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:54,559 INFO L470 AbstractCegarLoop]: Abstraction has 10012 states and 14384 transitions. [2021-12-17 03:23:54,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 14384 transitions. [2021-12-17 03:23:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-17 03:23:54,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:54,570 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:54,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 03:23:54,571 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 430388367, now seen corresponding path program 1 times [2021-12-17 03:23:54,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192659564] [2021-12-17 03:23:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:54,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2021-12-17 03:23:55,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192659564] [2021-12-17 03:23:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192659564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:55,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:55,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:23:55,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92023358] [2021-12-17 03:23:55,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:23:55,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:23:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:55,465 INFO L87 Difference]: Start difference. First operand 10012 states and 14384 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:57,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:59,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:59,526 INFO L93 Difference]: Finished difference Result 20021 states and 28764 transitions. [2021-12-17 03:23:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:23:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 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 640 [2021-12-17 03:23:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:59,536 INFO L225 Difference]: With dead ends: 20021 [2021-12-17 03:23:59,536 INFO L226 Difference]: Without dead ends: 10012 [2021-12-17 03:23:59,541 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 [2021-12-17 03:23:59,541 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 7 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:59,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 703 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-12-17 03:23:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2021-12-17 03:23:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 10012. [2021-12-17 03:23:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 10011 states have (on average 1.436719608430726) internal successors, (14383), 10011 states have internal predecessors, (14383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 14383 transitions. [2021-12-17 03:23:59,709 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 14383 transitions. Word has length 640 [2021-12-17 03:23:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:59,710 INFO L470 AbstractCegarLoop]: Abstraction has 10012 states and 14383 transitions. [2021-12-17 03:23:59,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 14383 transitions. [2021-12-17 03:23:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-12-17 03:23:59,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:59,724 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:23:59,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-17 03:23:59,724 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash -582769715, now seen corresponding path program 1 times [2021-12-17 03:23:59,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:59,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161707818] [2021-12-17 03:23:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:59,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 587 proven. 3234 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 03:24:02,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161707818] [2021-12-17 03:24:02,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161707818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:24:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271269602] [2021-12-17 03:24:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:02,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:24:02,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:24:02,636 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) [2021-12-17 03:24:02,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:24:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-17 03:24:03,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:24:03,967 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:24:03,967 INFO L388 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 [2021-12-17 03:24:04,092 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-17 03:24:04,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-17 03:24:04,178 INFO L388 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 14 treesize of output 12 [2021-12-17 03:24:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 24 [2021-12-17 03:24:04,297 INFO L388 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 [2021-12-17 03:24:04,406 INFO L388 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 [2021-12-17 03:24:04,409 INFO L388 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 6 treesize of output 5 [2021-12-17 03:24:04,431 INFO L354 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2021-12-17 03:24:04,432 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2021-12-17 03:24:04,447 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-17 03:24:04,447 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 64 [2021-12-17 03:24:04,451 INFO L388 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 [2021-12-17 03:24:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:04,499 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2021-12-17 03:24:04,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:04,503 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2021-12-17 03:24:04,524 INFO L354 Elim1Store]: treesize reduction 102, result has 34.2 percent of original size [2021-12-17 03:24:04,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 69 [2021-12-17 03:24:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:04,962 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 84 [2021-12-17 03:24:04,990 INFO L354 Elim1Store]: treesize reduction 190, result has 17.4 percent of original size [2021-12-17 03:24:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 80 [2021-12-17 03:24:04,994 INFO L388 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 80 treesize of output 62 [2021-12-17 03:24:06,235 INFO L354 Elim1Store]: treesize reduction 62, result has 39.8 percent of original size [2021-12-17 03:24:06,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 72 [2021-12-17 03:24:06,275 INFO L388 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 [2021-12-17 03:24:06,381 INFO L388 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 6 treesize of output 5 [2021-12-17 03:24:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:06,446 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2021-12-17 03:24:06,470 INFO L354 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2021-12-17 03:24:06,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 60 [2021-12-17 03:24:06,479 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:24:06,479 INFO L388 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 85 treesize of output 72 [2021-12-17 03:24:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,155 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-12-17 03:24:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,175 INFO L354 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2021-12-17 03:24:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2021-12-17 03:24:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,178 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-17 03:24:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,247 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-17 03:24:07,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,273 INFO L354 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2021-12-17 03:24:07,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2021-12-17 03:24:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,278 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-12-17 03:24:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,873 INFO L354 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2021-12-17 03:24:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2021-12-17 03:24:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:07,909 INFO L354 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2021-12-17 03:24:07,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2021-12-17 03:24:07,961 INFO L354 Elim1Store]: treesize reduction 53, result has 48.5 percent of original size [2021-12-17 03:24:07,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 75 [2021-12-17 03:24:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 305 treesize of output 251 [2021-12-17 03:24:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:09,361 INFO L354 Elim1Store]: treesize reduction 148, result has 30.2 percent of original size [2021-12-17 03:24:09,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 330 [2021-12-17 03:24:09,388 INFO L354 Elim1Store]: treesize reduction 154, result has 15.4 percent of original size [2021-12-17 03:24:09,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 333 treesize of output 267 [2021-12-17 03:24:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 242 [2021-12-17 03:24:15,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 236 [2021-12-17 03:24:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:15,776 INFO L354 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2021-12-17 03:24:15,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 300 [2021-12-17 03:24:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:16,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 87 [2021-12-17 03:24:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:16,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 59 [2021-12-17 03:24:16,203 INFO L354 Elim1Store]: treesize reduction 101, result has 22.9 percent of original size [2021-12-17 03:24:16,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 74 [2021-12-17 03:24:16,277 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-17 03:24:16,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-17 03:24:16,404 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:24:16,404 INFO L388 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 29 treesize of output 11 [2021-12-17 03:24:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1705 proven. 951 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2021-12-17 03:24:16,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:24:24,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 03:24:24,875 INFO L388 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 814 treesize of output 736 [2021-12-17 03:24:24,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:24,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 03:24:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 576 treesize of output 532 [2021-12-17 03:24:24,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,021 INFO L354 Elim1Store]: treesize reduction 134, result has 26.0 percent of original size [2021-12-17 03:24:25,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 594 treesize of output 490 [2021-12-17 03:24:25,027 INFO L388 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 518 treesize of output 488 [2021-12-17 03:24:25,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 478 treesize of output 418 [2021-12-17 03:24:25,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 03:24:25,047 INFO L388 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 418 treesize of output 390 [2021-12-17 03:24:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 03:24:25,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 330 treesize of output 326 [2021-12-17 03:24:25,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,156 INFO L354 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2021-12-17 03:24:25,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 310 [2021-12-17 03:24:25,161 INFO L388 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 312 treesize of output 298 [2021-12-17 03:24:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:24:25,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 265 [2021-12-17 03:24:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1689 proven. 141 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2021-12-17 03:24:34,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271269602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:24:34,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:24:34,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23, 14] total 61 [2021-12-17 03:24:34,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381073765] [2021-12-17 03:24:34,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:24:34,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-17 03:24:34,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-17 03:24:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3355, Unknown=5, NotChecked=0, Total=3660 [2021-12-17 03:24:34,034 INFO L87 Difference]: Start difference. First operand 10012 states and 14383 transitions. Second operand has 61 states, 61 states have (on average 16.770491803278688) internal successors, (1023), 61 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:35,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:37,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:39,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:40,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:42,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:44,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:46,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:48,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:51,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:54,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:56,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:57,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:59,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:33:42,107 WARN L227 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 111 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15