./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 791161d1 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-?-791161d [2022-07-22 11:19:57,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:19:57,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:19:57,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:19:57,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:19:57,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:19:57,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:19:57,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:19:57,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:19:57,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:19:57,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:19:57,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:19:57,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:19:57,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:19:57,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:19:57,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:19:57,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:19:57,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:19:57,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:19:57,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:19:57,949 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:19:57,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:19:57,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:19:57,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:19:57,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:19:57,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:19:57,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:19:57,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:19:57,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:19:57,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:19:57,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:19:57,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:19:57,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:19:57,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:19:57,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:19:57,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:19:57,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:19:57,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:19:57,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:19:57,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:19:57,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:19:57,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:19:57,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:19:57,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:19:57,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:19:57,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:19:57,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:19:57,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:19:57,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:19:57,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:19:57,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:19:57,990 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:19:57,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:19:57,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:19:57,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:19:57,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:19:57,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:19:57,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:19:57,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:19:57,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:19:57,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:19:57,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:19:57,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:19:57,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:19:57,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e559d44f6ee539bed570b1939999945f6f48ca1506c283f526f35c026a08bf8f [2022-07-22 11:19:58,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:19:58,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:19:58,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:19:58,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:19:58,199 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:19:58,200 INFO L432 ainManager$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 [2022-07-22 11:19:58,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a696b52d/3134717783d44d5bb14b5ae37f066606/FLAG966f5c0eb [2022-07-22 11:19:58,632 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:19:58,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c [2022-07-22 11:19:58,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a696b52d/3134717783d44d5bb14b5ae37f066606/FLAG966f5c0eb [2022-07-22 11:19:58,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a696b52d/3134717783d44d5bb14b5ae37f066606 [2022-07-22 11:19:58,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:19:58,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:19:58,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:19:58,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:19:58,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:19:58,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:19:58" (1/1) ... [2022-07-22 11:19:58,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572ad032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:58, skipping insertion in model container [2022-07-22 11:19:58,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:19:58" (1/1) ... [2022-07-22 11:19:58,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:19:59,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:19:59,326 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] [2022-07-22 11:19:59,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:19:59,346 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:19:59,432 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] [2022-07-22 11:19:59,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:19:59,451 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:19:59,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59 WrapperNode [2022-07-22 11:19:59,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:19:59,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:19:59,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:19:59,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:19:59,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,528 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 800 [2022-07-22 11:19:59,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:19:59,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:19:59,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:19:59,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:19:59,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:19:59,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:19:59,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:19:59,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:19:59,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (1/1) ... [2022-07-22 11:19:59,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:19:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:19:59,684 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) [2022-07-22 11:19:59,708 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 [2022-07-22 11:19:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:19:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:19:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:19:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:19:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:19:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:19:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:19:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:19:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:19:59,867 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:19:59,868 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:19:59,880 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:20:00,891 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-22 11:20:00,891 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-22 11:20:00,891 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:20:00,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:20:00,896 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:20:00,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:20:00 BoogieIcfgContainer [2022-07-22 11:20:00,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:20:00,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:20:00,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:20:00,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:20:00,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:19:58" (1/3) ... [2022-07-22 11:20:00,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2544b628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:20:00, skipping insertion in model container [2022-07-22 11:20:00,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:59" (2/3) ... [2022-07-22 11:20:00,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2544b628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:20:00, skipping insertion in model container [2022-07-22 11:20:00,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:20:00" (3/3) ... [2022-07-22 11:20:00,906 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-2.c [2022-07-22 11:20:00,918 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:20:00,918 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:20:00,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:20:00,983 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5853c9f1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d353df6 [2022-07-22 11:20:00,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:20:00,993 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) [2022-07-22 11:20:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:20:01,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:01,005 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:01,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:01,010 INFO L85 PathProgramCache]: Analyzing trace with hash 983008807, now seen corresponding path program 1 times [2022-07-22 11:20:01,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:01,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177946531] [2022-07-22 11:20:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:01,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:01,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177946531] [2022-07-22 11:20:01,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177946531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:01,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:01,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214698975] [2022-07-22 11:20:01,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:01,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:01,457 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) [2022-07-22 11:20:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:02,351 INFO L93 Difference]: Finished difference Result 431 states and 736 transitions. [2022-07-22 11:20:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:02,353 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 [2022-07-22 11:20:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:02,361 INFO L225 Difference]: With dead ends: 431 [2022-07-22 11:20:02,362 INFO L226 Difference]: Without dead ends: 262 [2022-07-22 11:20:02,364 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:02,367 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:02,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 465 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:20:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-22 11:20:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 181. [2022-07-22 11:20:02,404 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) [2022-07-22 11:20:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2022-07-22 11:20:02,405 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 46 [2022-07-22 11:20:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:02,406 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2022-07-22 11:20:02,406 INFO L496 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) [2022-07-22 11:20:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2022-07-22 11:20:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 11:20:02,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:02,408 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:02,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:20:02,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -829195320, now seen corresponding path program 1 times [2022-07-22 11:20:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:02,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269851734] [2022-07-22 11:20:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:02,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:02,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269851734] [2022-07-22 11:20:02,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269851734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:02,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:02,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:02,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250612927] [2022-07-22 11:20:02,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:02,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:02,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:02,526 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) [2022-07-22 11:20:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:03,023 INFO L93 Difference]: Finished difference Result 380 states and 609 transitions. [2022-07-22 11:20:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:03,024 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 [2022-07-22 11:20:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:03,025 INFO L225 Difference]: With dead ends: 380 [2022-07-22 11:20:03,025 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 11:20:03,026 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:03,027 INFO L413 NwaCegarLoop]: 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:03,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 493 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:20:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 11:20:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2022-07-22 11:20:03,036 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) [2022-07-22 11:20:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 310 transitions. [2022-07-22 11:20:03,037 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 310 transitions. Word has length 47 [2022-07-22 11:20:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:03,038 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 310 transitions. [2022-07-22 11:20:03,038 INFO L496 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) [2022-07-22 11:20:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 310 transitions. [2022-07-22 11:20:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:20:03,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:03,040 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:03,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:20:03,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1049124123, now seen corresponding path program 1 times [2022-07-22 11:20:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379602226] [2022-07-22 11:20:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:03,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:03,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379602226] [2022-07-22 11:20:03,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379602226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:03,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:03,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700969693] [2022-07-22 11:20:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:03,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:03,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:03,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:03,152 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) [2022-07-22 11:20:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:03,725 INFO L93 Difference]: Finished difference Result 522 states and 847 transitions. [2022-07-22 11:20:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:03,726 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 [2022-07-22 11:20:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:03,727 INFO L225 Difference]: With dead ends: 522 [2022-07-22 11:20:03,727 INFO L226 Difference]: Without dead ends: 351 [2022-07-22 11:20:03,728 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:03,729 INFO L413 NwaCegarLoop]: 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:03,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 650 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:20:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-22 11:20:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-07-22 11:20:03,752 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) [2022-07-22 11:20:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 361 transitions. [2022-07-22 11:20:03,754 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 361 transitions. Word has length 60 [2022-07-22 11:20:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:03,754 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 361 transitions. [2022-07-22 11:20:03,755 INFO L496 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) [2022-07-22 11:20:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 361 transitions. [2022-07-22 11:20:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:20:03,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:03,762 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:03,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:20:03,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1463598922, now seen corresponding path program 1 times [2022-07-22 11:20:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:03,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492861593] [2022-07-22 11:20:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:03,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492861593] [2022-07-22 11:20:03,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492861593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:03,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:03,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:03,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595370331] [2022-07-22 11:20:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:03,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:03,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:03,890 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) [2022-07-22 11:20:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:04,240 INFO L93 Difference]: Finished difference Result 443 states and 710 transitions. [2022-07-22 11:20:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:04,241 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 [2022-07-22 11:20:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:04,242 INFO L225 Difference]: With dead ends: 443 [2022-07-22 11:20:04,242 INFO L226 Difference]: Without dead ends: 240 [2022-07-22 11:20:04,243 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:04,243 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 28 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:04,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 497 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:20:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-22 11:20:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-07-22 11:20:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.6143497757847534) internal successors, (360), 223 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 360 transitions. [2022-07-22 11:20:04,254 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 360 transitions. Word has length 61 [2022-07-22 11:20:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:04,255 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 360 transitions. [2022-07-22 11:20:04,255 INFO L496 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) [2022-07-22 11:20:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 360 transitions. [2022-07-22 11:20:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:20:04,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:04,256 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:04,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:20:04,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash -625588150, now seen corresponding path program 1 times [2022-07-22 11:20:04,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:04,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036304091] [2022-07-22 11:20:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:04,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:04,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036304091] [2022-07-22 11:20:04,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036304091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:04,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:04,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691870180] [2022-07-22 11:20:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:04,387 INFO L87 Difference]: Start difference. First operand 224 states and 360 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) [2022-07-22 11:20:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:04,776 INFO L93 Difference]: Finished difference Result 443 states and 709 transitions. [2022-07-22 11:20:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:04,776 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 [2022-07-22 11:20:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:04,777 INFO L225 Difference]: With dead ends: 443 [2022-07-22 11:20:04,777 INFO L226 Difference]: Without dead ends: 240 [2022-07-22 11:20:04,778 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:04,780 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 26 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:04,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 497 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:20:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-22 11:20:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-07-22 11:20:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.609865470852018) internal successors, (359), 223 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 359 transitions. [2022-07-22 11:20:04,792 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 359 transitions. Word has length 61 [2022-07-22 11:20:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:04,793 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 359 transitions. [2022-07-22 11:20:04,793 INFO L496 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) [2022-07-22 11:20:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 359 transitions. [2022-07-22 11:20:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:20:04,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:04,794 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:04,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:20:04,794 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash 828942689, now seen corresponding path program 1 times [2022-07-22 11:20:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:04,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979601418] [2022-07-22 11:20:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:04,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979601418] [2022-07-22 11:20:04,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979601418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:04,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:04,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:04,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617221490] [2022-07-22 11:20:04,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:04,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:04,903 INFO L87 Difference]: Start difference. First operand 224 states and 359 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) [2022-07-22 11:20:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:05,309 INFO L93 Difference]: Finished difference Result 442 states and 707 transitions. [2022-07-22 11:20:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:05,310 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 [2022-07-22 11:20:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:05,311 INFO L225 Difference]: With dead ends: 442 [2022-07-22 11:20:05,311 INFO L226 Difference]: Without dead ends: 239 [2022-07-22 11:20:05,311 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:05,312 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 19 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:05,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 499 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:20:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-22 11:20:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2022-07-22 11:20:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 223 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 358 transitions. [2022-07-22 11:20:05,317 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 358 transitions. Word has length 61 [2022-07-22 11:20:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:05,317 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 358 transitions. [2022-07-22 11:20:05,317 INFO L496 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) [2022-07-22 11:20:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 358 transitions. [2022-07-22 11:20:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:20:05,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:05,318 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:05,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:20:05,318 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash -120405471, now seen corresponding path program 1 times [2022-07-22 11:20:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717816528] [2022-07-22 11:20:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717816528] [2022-07-22 11:20:05,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717816528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:05,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:05,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979760072] [2022-07-22 11:20:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:05,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:05,404 INFO L87 Difference]: Start difference. First operand 224 states and 358 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) [2022-07-22 11:20:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:05,974 INFO L93 Difference]: Finished difference Result 531 states and 848 transitions. [2022-07-22 11:20:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:05,975 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 [2022-07-22 11:20:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:05,976 INFO L225 Difference]: With dead ends: 531 [2022-07-22 11:20:05,976 INFO L226 Difference]: Without dead ends: 328 [2022-07-22 11:20:05,976 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:05,977 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 148 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:05,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 356 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:20:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-22 11:20:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 225. [2022-07-22 11:20:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.59375) internal successors, (357), 224 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) [2022-07-22 11:20:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 357 transitions. [2022-07-22 11:20:05,982 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 357 transitions. Word has length 61 [2022-07-22 11:20:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:05,982 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 357 transitions. [2022-07-22 11:20:05,982 INFO L496 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) [2022-07-22 11:20:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 357 transitions. [2022-07-22 11:20:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:20:05,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:05,983 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:05,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:20:05,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2112722766, now seen corresponding path program 1 times [2022-07-22 11:20:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175405429] [2022-07-22 11:20:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:05,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:06,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175405429] [2022-07-22 11:20:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175405429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:06,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:06,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704214436] [2022-07-22 11:20:06,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:06,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:06,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:06,064 INFO L87 Difference]: Start difference. First operand 225 states and 357 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) [2022-07-22 11:20:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:06,894 INFO L93 Difference]: Finished difference Result 442 states and 703 transitions. [2022-07-22 11:20:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:06,895 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 [2022-07-22 11:20:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:06,896 INFO L225 Difference]: With dead ends: 442 [2022-07-22 11:20:06,896 INFO L226 Difference]: Without dead ends: 238 [2022-07-22 11:20:06,896 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:06,897 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 22 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 503 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:20:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-22 11:20:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 225. [2022-07-22 11:20:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5892857142857142) internal successors, (356), 224 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 356 transitions. [2022-07-22 11:20:06,902 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 356 transitions. Word has length 62 [2022-07-22 11:20:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:06,902 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 356 transitions. [2022-07-22 11:20:06,902 INFO L496 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) [2022-07-22 11:20:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 356 transitions. [2022-07-22 11:20:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 11:20:06,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:06,903 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:20:06,904 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1062218447, now seen corresponding path program 1 times [2022-07-22 11:20:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:06,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683254872] [2022-07-22 11:20:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:07,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:07,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683254872] [2022-07-22 11:20:07,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683254872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:07,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:07,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:07,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284898812] [2022-07-22 11:20:07,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:07,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:07,008 INFO L87 Difference]: Start difference. First operand 225 states and 356 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) [2022-07-22 11:20:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:07,428 INFO L93 Difference]: Finished difference Result 442 states and 702 transitions. [2022-07-22 11:20:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:07,429 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 [2022-07-22 11:20:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:07,430 INFO L225 Difference]: With dead ends: 442 [2022-07-22 11:20:07,430 INFO L226 Difference]: Without dead ends: 238 [2022-07-22 11:20:07,430 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:07,430 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 20 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 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 [2022-07-22 11:20:07,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 503 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:20:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-22 11:20:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 225. [2022-07-22 11:20:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5848214285714286) internal successors, (355), 224 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 355 transitions. [2022-07-22 11:20:07,435 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 355 transitions. Word has length 63 [2022-07-22 11:20:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:07,435 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 355 transitions. [2022-07-22 11:20:07,435 INFO L496 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) [2022-07-22 11:20:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 355 transitions. [2022-07-22 11:20:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 11:20:07,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:07,436 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:20:07,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1477441165, now seen corresponding path program 1 times [2022-07-22 11:20:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700131759] [2022-07-22 11:20:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:07,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700131759] [2022-07-22 11:20:07,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700131759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:07,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:07,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:07,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304593223] [2022-07-22 11:20:07,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:07,517 INFO L87 Difference]: Start difference. First operand 225 states and 355 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) [2022-07-22 11:20:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:08,234 INFO L93 Difference]: Finished difference Result 432 states and 688 transitions. [2022-07-22 11:20:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:08,235 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 [2022-07-22 11:20:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:08,235 INFO L225 Difference]: With dead ends: 432 [2022-07-22 11:20:08,236 INFO L226 Difference]: Without dead ends: 228 [2022-07-22 11:20:08,236 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:08,236 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 11 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:08,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 517 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:20:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-22 11:20:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2022-07-22 11:20:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5803571428571428) internal successors, (354), 224 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 354 transitions. [2022-07-22 11:20:08,260 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 354 transitions. Word has length 64 [2022-07-22 11:20:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:08,260 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 354 transitions. [2022-07-22 11:20:08,260 INFO L496 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) [2022-07-22 11:20:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 354 transitions. [2022-07-22 11:20:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 11:20:08,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:08,261 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:20:08,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1077289765, now seen corresponding path program 1 times [2022-07-22 11:20:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:08,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607922566] [2022-07-22 11:20:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:08,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:08,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607922566] [2022-07-22 11:20:08,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607922566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:08,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:08,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599326800] [2022-07-22 11:20:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:08,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:08,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:08,333 INFO L87 Difference]: Start difference. First operand 225 states and 354 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) [2022-07-22 11:20:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:09,052 INFO L93 Difference]: Finished difference Result 532 states and 842 transitions. [2022-07-22 11:20:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:09,052 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 [2022-07-22 11:20:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:09,054 INFO L225 Difference]: With dead ends: 532 [2022-07-22 11:20:09,054 INFO L226 Difference]: Without dead ends: 328 [2022-07-22 11:20:09,054 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:09,054 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 125 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:09,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 382 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:20:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-22 11:20:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 248. [2022-07-22 11:20:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 247 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 399 transitions. [2022-07-22 11:20:09,060 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 399 transitions. Word has length 64 [2022-07-22 11:20:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:09,060 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 399 transitions. [2022-07-22 11:20:09,060 INFO L496 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) [2022-07-22 11:20:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 399 transitions. [2022-07-22 11:20:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 11:20:09,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:09,061 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:20:09,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -212151294, now seen corresponding path program 1 times [2022-07-22 11:20:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:09,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43741070] [2022-07-22 11:20:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43741070] [2022-07-22 11:20:09,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43741070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:09,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:09,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:09,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210850811] [2022-07-22 11:20:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:09,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:09,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:09,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:09,165 INFO L87 Difference]: Start difference. First operand 248 states and 399 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) [2022-07-22 11:20:10,183 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 [] [2022-07-22 11:20:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:10,468 INFO L93 Difference]: Finished difference Result 631 states and 1024 transitions. [2022-07-22 11:20:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:10,468 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 92 [2022-07-22 11:20:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:10,470 INFO L225 Difference]: With dead ends: 631 [2022-07-22 11:20:10,470 INFO L226 Difference]: Without dead ends: 404 [2022-07-22 11:20:10,470 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:10,471 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 131 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:10,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 366 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:20:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-07-22 11:20:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 312. [2022-07-22 11:20:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.6430868167202572) internal successors, (511), 311 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 511 transitions. [2022-07-22 11:20:10,478 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 511 transitions. Word has length 92 [2022-07-22 11:20:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:10,479 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 511 transitions. [2022-07-22 11:20:10,479 INFO L496 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) [2022-07-22 11:20:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 511 transitions. [2022-07-22 11:20:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 11:20:10,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:10,480 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:10,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:20:10,480 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash -445450899, now seen corresponding path program 1 times [2022-07-22 11:20:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611491255] [2022-07-22 11:20:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:20:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611491255] [2022-07-22 11:20:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611491255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:10,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:10,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145015689] [2022-07-22 11:20:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:10,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:10,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:10,581 INFO L87 Difference]: Start difference. First operand 312 states and 511 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) [2022-07-22 11:20:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:11,463 INFO L93 Difference]: Finished difference Result 723 states and 1180 transitions. [2022-07-22 11:20:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:11,464 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 97 [2022-07-22 11:20:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:11,465 INFO L225 Difference]: With dead ends: 723 [2022-07-22 11:20:11,465 INFO L226 Difference]: Without dead ends: 432 [2022-07-22 11:20:11,466 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:11,466 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 127 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:11,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 11:20:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-22 11:20:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 349. [2022-07-22 11:20:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.6522988505747127) internal successors, (575), 348 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 575 transitions. [2022-07-22 11:20:11,473 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 575 transitions. Word has length 97 [2022-07-22 11:20:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:11,473 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 575 transitions. [2022-07-22 11:20:11,473 INFO L496 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) [2022-07-22 11:20:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 575 transitions. [2022-07-22 11:20:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-22 11:20:11,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:11,474 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:20:11,474 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1163497164, now seen corresponding path program 1 times [2022-07-22 11:20:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787350959] [2022-07-22 11:20:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:20:11,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787350959] [2022-07-22 11:20:11,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787350959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:11,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:11,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722830720] [2022-07-22 11:20:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:11,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:11,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:11,574 INFO L87 Difference]: Start difference. First operand 349 states and 575 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) [2022-07-22 11:20:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:12,194 INFO L93 Difference]: Finished difference Result 718 states and 1187 transitions. [2022-07-22 11:20:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:12,195 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 98 [2022-07-22 11:20:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:12,196 INFO L225 Difference]: With dead ends: 718 [2022-07-22 11:20:12,196 INFO L226 Difference]: Without dead ends: 390 [2022-07-22 11:20:12,197 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:12,197 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 32 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:12,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 519 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:20:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-22 11:20:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 371. [2022-07-22 11:20:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6513513513513514) internal successors, (611), 370 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 611 transitions. [2022-07-22 11:20:12,206 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 611 transitions. Word has length 98 [2022-07-22 11:20:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:12,206 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 611 transitions. [2022-07-22 11:20:12,206 INFO L496 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) [2022-07-22 11:20:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 611 transitions. [2022-07-22 11:20:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 11:20:12,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:12,208 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:20:12,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:20:12,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2059005282, now seen corresponding path program 1 times [2022-07-22 11:20:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875402646] [2022-07-22 11:20:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:20:12,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875402646] [2022-07-22 11:20:12,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875402646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:12,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:12,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612061453] [2022-07-22 11:20:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:12,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:12,291 INFO L87 Difference]: Start difference. First operand 371 states and 611 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) [2022-07-22 11:20:13,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:14,046 INFO L93 Difference]: Finished difference Result 739 states and 1221 transitions. [2022-07-22 11:20:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:14,046 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 112 [2022-07-22 11:20:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:14,048 INFO L225 Difference]: With dead ends: 739 [2022-07-22 11:20:14,048 INFO L226 Difference]: Without dead ends: 389 [2022-07-22 11:20:14,048 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:14,049 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 42 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:14,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 521 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 11:20:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-22 11:20:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 371. [2022-07-22 11:20:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6486486486486487) internal successors, (610), 370 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 610 transitions. [2022-07-22 11:20:14,057 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 610 transitions. Word has length 112 [2022-07-22 11:20:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:14,057 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 610 transitions. [2022-07-22 11:20:14,058 INFO L496 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) [2022-07-22 11:20:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 610 transitions. [2022-07-22 11:20:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 11:20:14,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:14,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:20:14,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:20:14,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash -763752458, now seen corresponding path program 1 times [2022-07-22 11:20:14,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096739842] [2022-07-22 11:20:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:14,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:20:14,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096739842] [2022-07-22 11:20:14,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096739842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:14,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468311198] [2022-07-22 11:20:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:14,145 INFO L87 Difference]: Start difference. First operand 371 states and 610 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) [2022-07-22 11:20:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:15,354 INFO L93 Difference]: Finished difference Result 801 states and 1308 transitions. [2022-07-22 11:20:15,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:15,355 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 112 [2022-07-22 11:20:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:15,357 INFO L225 Difference]: With dead ends: 801 [2022-07-22 11:20:15,357 INFO L226 Difference]: Without dead ends: 451 [2022-07-22 11:20:15,357 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:15,358 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 152 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:15,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 354 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:20:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-22 11:20:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 371. [2022-07-22 11:20:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6297297297297297) internal successors, (603), 370 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 603 transitions. [2022-07-22 11:20:15,367 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 603 transitions. Word has length 112 [2022-07-22 11:20:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:15,367 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 603 transitions. [2022-07-22 11:20:15,367 INFO L496 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) [2022-07-22 11:20:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 603 transitions. [2022-07-22 11:20:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 11:20:15,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:15,368 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:20:15,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1523411789, now seen corresponding path program 1 times [2022-07-22 11:20:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:15,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537189972] [2022-07-22 11:20:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:20:15,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537189972] [2022-07-22 11:20:15,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537189972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:15,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:15,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843226423] [2022-07-22 11:20:15,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:15,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:15,443 INFO L87 Difference]: Start difference. First operand 371 states and 603 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) [2022-07-22 11:20:17,448 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 [] [2022-07-22 11:20:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:17,750 INFO L93 Difference]: Finished difference Result 738 states and 1204 transitions. [2022-07-22 11:20:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:17,751 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 112 [2022-07-22 11:20:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:17,752 INFO L225 Difference]: With dead ends: 738 [2022-07-22 11:20:17,752 INFO L226 Difference]: Without dead ends: 388 [2022-07-22 11:20:17,752 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:17,753 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 33 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:17,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:20:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-22 11:20:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2022-07-22 11:20:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.627027027027027) internal successors, (602), 370 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 602 transitions. [2022-07-22 11:20:17,759 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 602 transitions. Word has length 112 [2022-07-22 11:20:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:17,759 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 602 transitions. [2022-07-22 11:20:17,760 INFO L496 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) [2022-07-22 11:20:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 602 transitions. [2022-07-22 11:20:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 11:20:17,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:17,761 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:17,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:20:17,761 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1338827316, now seen corresponding path program 1 times [2022-07-22 11:20:17,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:17,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020755807] [2022-07-22 11:20:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:20:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:17,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020755807] [2022-07-22 11:20:17,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020755807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:17,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:17,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:17,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145443960] [2022-07-22 11:20:17,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:17,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:17,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:17,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:17,860 INFO L87 Difference]: Start difference. First operand 371 states and 602 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) [2022-07-22 11:20:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:18,982 INFO L93 Difference]: Finished difference Result 738 states and 1202 transitions. [2022-07-22 11:20:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:18,983 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 113 [2022-07-22 11:20:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:18,984 INFO L225 Difference]: With dead ends: 738 [2022-07-22 11:20:18,984 INFO L226 Difference]: Without dead ends: 388 [2022-07-22 11:20:18,985 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:18,985 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 37 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:18,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 11:20:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-22 11:20:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2022-07-22 11:20:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6243243243243244) internal successors, (601), 370 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 601 transitions. [2022-07-22 11:20:18,991 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 601 transitions. Word has length 113 [2022-07-22 11:20:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:18,991 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 601 transitions. [2022-07-22 11:20:18,991 INFO L496 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) [2022-07-22 11:20:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 601 transitions. [2022-07-22 11:20:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-22 11:20:18,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:18,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:20:18,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:20:18,993 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1036019589, now seen corresponding path program 1 times [2022-07-22 11:20:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:18,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627171730] [2022-07-22 11:20:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:20:19,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627171730] [2022-07-22 11:20:19,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627171730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:19,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:19,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:19,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776592882] [2022-07-22 11:20:19,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:19,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:19,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:19,082 INFO L87 Difference]: Start difference. First operand 371 states and 601 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:19,600 INFO L93 Difference]: Finished difference Result 738 states and 1200 transitions. [2022-07-22 11:20:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-22 11:20:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:19,602 INFO L225 Difference]: With dead ends: 738 [2022-07-22 11:20:19,602 INFO L226 Difference]: Without dead ends: 388 [2022-07-22 11:20:19,603 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:19,603 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 35 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:19,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:20:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-22 11:20:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2022-07-22 11:20:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6216216216216217) internal successors, (600), 370 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 600 transitions. [2022-07-22 11:20:19,609 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 600 transitions. Word has length 114 [2022-07-22 11:20:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:19,610 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 600 transitions. [2022-07-22 11:20:19,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 600 transitions. [2022-07-22 11:20:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 11:20:19,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:19,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:20:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:20:19,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -477172775, now seen corresponding path program 1 times [2022-07-22 11:20:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:19,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583488882] [2022-07-22 11:20:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:20:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583488882] [2022-07-22 11:20:19,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583488882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:19,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:19,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415590315] [2022-07-22 11:20:19,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:19,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:19,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:19,731 INFO L87 Difference]: Start difference. First operand 371 states and 600 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) [2022-07-22 11:20:21,420 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 [] [2022-07-22 11:20:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:21,594 INFO L93 Difference]: Finished difference Result 728 states and 1185 transitions. [2022-07-22 11:20:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:21,594 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 115 [2022-07-22 11:20:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:21,595 INFO L225 Difference]: With dead ends: 728 [2022-07-22 11:20:21,595 INFO L226 Difference]: Without dead ends: 378 [2022-07-22 11:20:21,596 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:21,596 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 26 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 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, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:21,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 537 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:20:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-22 11:20:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2022-07-22 11:20:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6189189189189188) internal successors, (599), 370 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 599 transitions. [2022-07-22 11:20:21,602 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 599 transitions. Word has length 115 [2022-07-22 11:20:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:21,602 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 599 transitions. [2022-07-22 11:20:21,602 INFO L496 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) [2022-07-22 11:20:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 599 transitions. [2022-07-22 11:20:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:20:21,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:21,603 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:20:21,603 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1048591620, now seen corresponding path program 1 times [2022-07-22 11:20:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712244843] [2022-07-22 11:20:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:20:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:21,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712244843] [2022-07-22 11:20:21,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712244843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:21,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:21,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620499701] [2022-07-22 11:20:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:21,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:21,704 INFO L87 Difference]: Start difference. First operand 371 states and 599 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) [2022-07-22 11:20:23,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:23,355 INFO L93 Difference]: Finished difference Result 815 states and 1316 transitions. [2022-07-22 11:20:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:23,356 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 [2022-07-22 11:20:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:23,357 INFO L225 Difference]: With dead ends: 815 [2022-07-22 11:20:23,357 INFO L226 Difference]: Without dead ends: 465 [2022-07-22 11:20:23,358 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:23,358 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 82 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:23,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 485 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:20:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-22 11:20:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 411. [2022-07-22 11:20:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.6243902439024391) internal successors, (666), 410 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 666 transitions. [2022-07-22 11:20:23,365 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 666 transitions. Word has length 120 [2022-07-22 11:20:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:23,365 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 666 transitions. [2022-07-22 11:20:23,365 INFO L496 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) [2022-07-22 11:20:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 666 transitions. [2022-07-22 11:20:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:20:23,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:23,366 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:20:23,366 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1021526018, now seen corresponding path program 1 times [2022-07-22 11:20:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:23,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065267079] [2022-07-22 11:20:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:20:23,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065267079] [2022-07-22 11:20:23,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065267079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:23,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:23,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:23,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991956047] [2022-07-22 11:20:23,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:23,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:23,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:23,469 INFO L87 Difference]: Start difference. First operand 411 states and 666 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) [2022-07-22 11:20:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:24,061 INFO L93 Difference]: Finished difference Result 848 states and 1377 transitions. [2022-07-22 11:20:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:24,062 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 [2022-07-22 11:20:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:24,063 INFO L225 Difference]: With dead ends: 848 [2022-07-22 11:20:24,063 INFO L226 Difference]: Without dead ends: 458 [2022-07-22 11:20:24,064 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:24,064 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 37 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:24,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 617 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:20:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-22 11:20:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 435. [2022-07-22 11:20:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.6244239631336406) internal successors, (705), 434 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 705 transitions. [2022-07-22 11:20:24,071 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 705 transitions. Word has length 120 [2022-07-22 11:20:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:24,071 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 705 transitions. [2022-07-22 11:20:24,071 INFO L496 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) [2022-07-22 11:20:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 705 transitions. [2022-07-22 11:20:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 11:20:24,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:24,072 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:24,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:20:24,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:24,073 INFO L85 PathProgramCache]: Analyzing trace with hash -909602799, now seen corresponding path program 1 times [2022-07-22 11:20:24,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:24,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339695060] [2022-07-22 11:20:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:24,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:20:24,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339695060] [2022-07-22 11:20:24,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339695060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:24,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:24,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088840332] [2022-07-22 11:20:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:24,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:24,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:24,155 INFO L87 Difference]: Start difference. First operand 435 states and 705 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) [2022-07-22 11:20:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:24,818 INFO L93 Difference]: Finished difference Result 894 states and 1445 transitions. [2022-07-22 11:20:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:24,818 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 [2022-07-22 11:20:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:24,820 INFO L225 Difference]: With dead ends: 894 [2022-07-22 11:20:24,820 INFO L226 Difference]: Without dead ends: 480 [2022-07-22 11:20:24,820 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:24,821 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 64 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:24,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 491 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:20:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-07-22 11:20:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 438. [2022-07-22 11:20:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.620137299771167) internal successors, (708), 437 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 708 transitions. [2022-07-22 11:20:24,827 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 708 transitions. Word has length 128 [2022-07-22 11:20:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:24,828 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 708 transitions. [2022-07-22 11:20:24,828 INFO L496 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) [2022-07-22 11:20:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 708 transitions. [2022-07-22 11:20:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 11:20:24,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:24,829 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2022-07-22 11:20:24,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:20:24,830 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:24,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1310949078, now seen corresponding path program 1 times [2022-07-22 11:20:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:24,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054758001] [2022-07-22 11:20:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:24,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:24,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054758001] [2022-07-22 11:20:24,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054758001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:24,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:24,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328449107] [2022-07-22 11:20:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:24,924 INFO L87 Difference]: Start difference. First operand 438 states and 708 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) [2022-07-22 11:20:26,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:26,430 INFO L93 Difference]: Finished difference Result 934 states and 1503 transitions. [2022-07-22 11:20:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:26,436 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 [2022-07-22 11:20:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:26,438 INFO L225 Difference]: With dead ends: 934 [2022-07-22 11:20:26,438 INFO L226 Difference]: Without dead ends: 517 [2022-07-22 11:20:26,438 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:26,439 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 152 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:26,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 356 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:20:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-22 11:20:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 438. [2022-07-22 11:20:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.6018306636155606) internal successors, (700), 437 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 700 transitions. [2022-07-22 11:20:26,446 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 700 transitions. Word has length 134 [2022-07-22 11:20:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:26,446 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 700 transitions. [2022-07-22 11:20:26,446 INFO L496 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) [2022-07-22 11:20:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 700 transitions. [2022-07-22 11:20:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 11:20:26,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:26,447 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:20:26,448 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1846542571, now seen corresponding path program 1 times [2022-07-22 11:20:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229161840] [2022-07-22 11:20:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:26,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:26,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229161840] [2022-07-22 11:20:26,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229161840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:26,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:26,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523077064] [2022-07-22 11:20:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:26,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:26,533 INFO L87 Difference]: Start difference. First operand 438 states and 700 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) [2022-07-22 11:20:27,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:28,212 INFO L93 Difference]: Finished difference Result 933 states and 1486 transitions. [2022-07-22 11:20:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:28,212 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 [2022-07-22 11:20:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:28,214 INFO L225 Difference]: With dead ends: 933 [2022-07-22 11:20:28,214 INFO L226 Difference]: Without dead ends: 516 [2022-07-22 11:20:28,215 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:28,215 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 144 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 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, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:28,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 358 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 11:20:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-22 11:20:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 438. [2022-07-22 11:20:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.585812356979405) internal successors, (693), 437 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 693 transitions. [2022-07-22 11:20:28,247 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 693 transitions. Word has length 134 [2022-07-22 11:20:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:28,248 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 693 transitions. [2022-07-22 11:20:28,248 INFO L496 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) [2022-07-22 11:20:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 693 transitions. [2022-07-22 11:20:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 11:20:28,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:28,249 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 11:20:28,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -50542740, now seen corresponding path program 1 times [2022-07-22 11:20:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:28,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824192247] [2022-07-22 11:20:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:28,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 11:20:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824192247] [2022-07-22 11:20:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824192247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:28,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:28,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:20:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440143869] [2022-07-22 11:20:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:20:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:28,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:20:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:28,338 INFO L87 Difference]: Start difference. First operand 438 states and 693 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) [2022-07-22 11:20:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:29,658 INFO L93 Difference]: Finished difference Result 865 states and 1374 transitions. [2022-07-22 11:20:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:20:29,659 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 [2022-07-22 11:20:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:29,660 INFO L225 Difference]: With dead ends: 865 [2022-07-22 11:20:29,660 INFO L226 Difference]: Without dead ends: 448 [2022-07-22 11:20:29,661 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:29,661 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 153 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:29,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 384 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:20:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-07-22 11:20:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2022-07-22 11:20:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5784753363228698) internal successors, (704), 446 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 704 transitions. [2022-07-22 11:20:29,668 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 704 transitions. Word has length 135 [2022-07-22 11:20:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:29,668 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 704 transitions. [2022-07-22 11:20:29,668 INFO L496 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) [2022-07-22 11:20:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 704 transitions. [2022-07-22 11:20:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-22 11:20:29,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:29,670 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:29,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 11:20:29,670 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash 181553585, now seen corresponding path program 1 times [2022-07-22 11:20:29,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:29,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027401255] [2022-07-22 11:20:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:29,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:29,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027401255] [2022-07-22 11:20:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027401255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690543296] [2022-07-22 11:20:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:29,749 INFO L87 Difference]: Start difference. First operand 447 states and 704 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) [2022-07-22 11:20:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:30,355 INFO L93 Difference]: Finished difference Result 913 states and 1436 transitions. [2022-07-22 11:20:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:30,356 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 [2022-07-22 11:20:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:30,357 INFO L225 Difference]: With dead ends: 913 [2022-07-22 11:20:30,357 INFO L226 Difference]: Without dead ends: 487 [2022-07-22 11:20:30,358 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:30,358 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:30,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 521 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:20:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-07-22 11:20:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 447. [2022-07-22 11:20:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5762331838565022) internal successors, (703), 446 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 703 transitions. [2022-07-22 11:20:30,366 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 703 transitions. Word has length 136 [2022-07-22 11:20:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:30,366 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 703 transitions. [2022-07-22 11:20:30,366 INFO L496 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) [2022-07-22 11:20:30,366 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 703 transitions. [2022-07-22 11:20:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-22 11:20:30,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:30,367 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:30,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 11:20:30,367 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash -701955405, now seen corresponding path program 1 times [2022-07-22 11:20:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:30,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727028946] [2022-07-22 11:20:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727028946] [2022-07-22 11:20:30,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727028946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:30,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:30,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035370920] [2022-07-22 11:20:30,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:30,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:30,457 INFO L87 Difference]: Start difference. First operand 447 states and 703 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) [2022-07-22 11:20:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:31,581 INFO L93 Difference]: Finished difference Result 894 states and 1408 transitions. [2022-07-22 11:20:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:31,581 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 [2022-07-22 11:20:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:31,583 INFO L225 Difference]: With dead ends: 894 [2022-07-22 11:20:31,583 INFO L226 Difference]: Without dead ends: 468 [2022-07-22 11:20:31,583 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:31,584 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 45 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:31,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 613 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 11:20:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-22 11:20:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 447. [2022-07-22 11:20:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5739910313901346) internal successors, (702), 446 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 702 transitions. [2022-07-22 11:20:31,591 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 702 transitions. Word has length 136 [2022-07-22 11:20:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:31,592 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 702 transitions. [2022-07-22 11:20:31,592 INFO L496 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) [2022-07-22 11:20:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 702 transitions. [2022-07-22 11:20:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-22 11:20:31,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:31,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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] [2022-07-22 11:20:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:20:31,593 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 246747578, now seen corresponding path program 1 times [2022-07-22 11:20:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:31,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870986780] [2022-07-22 11:20:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:31,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:31,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870986780] [2022-07-22 11:20:31,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870986780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:31,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:31,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:31,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976183315] [2022-07-22 11:20:31,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:31,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:31,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:31,682 INFO L87 Difference]: Start difference. First operand 447 states and 702 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:32,220 INFO L93 Difference]: Finished difference Result 951 states and 1489 transitions. [2022-07-22 11:20:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-07-22 11:20:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:32,221 INFO L225 Difference]: With dead ends: 951 [2022-07-22 11:20:32,221 INFO L226 Difference]: Without dead ends: 525 [2022-07-22 11:20:32,222 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:32,222 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 147 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:32,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 366 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:20:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-22 11:20:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 447. [2022-07-22 11:20:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5560538116591929) internal successors, (694), 446 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 694 transitions. [2022-07-22 11:20:32,230 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 694 transitions. Word has length 137 [2022-07-22 11:20:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:32,230 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 694 transitions. [2022-07-22 11:20:32,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 694 transitions. [2022-07-22 11:20:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-22 11:20:32,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:32,231 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2022-07-22 11:20:32,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:20:32,232 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash -282582356, now seen corresponding path program 1 times [2022-07-22 11:20:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:32,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454862099] [2022-07-22 11:20:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:32,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:32,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:32,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454862099] [2022-07-22 11:20:32,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454862099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:32,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:32,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:32,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202936040] [2022-07-22 11:20:32,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:32,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:32,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:32,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:32,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:32,320 INFO L87 Difference]: Start difference. First operand 447 states and 694 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:33,018 INFO L93 Difference]: Finished difference Result 951 states and 1473 transitions. [2022-07-22 11:20:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:33,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 138 [2022-07-22 11:20:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:33,020 INFO L225 Difference]: With dead ends: 951 [2022-07-22 11:20:33,020 INFO L226 Difference]: Without dead ends: 525 [2022-07-22 11:20:33,021 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:33,021 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 145 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:33,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 394 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:20:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-22 11:20:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 447. [2022-07-22 11:20:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5381165919282511) internal successors, (686), 446 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 686 transitions. [2022-07-22 11:20:33,028 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 686 transitions. Word has length 138 [2022-07-22 11:20:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:33,028 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 686 transitions. [2022-07-22 11:20:33,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 686 transitions. [2022-07-22 11:20:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-22 11:20:33,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:33,030 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 11:20:33,030 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -655242258, now seen corresponding path program 1 times [2022-07-22 11:20:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129586894] [2022-07-22 11:20:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 11:20:33,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129586894] [2022-07-22 11:20:33,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129586894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:33,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:33,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901194268] [2022-07-22 11:20:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:33,129 INFO L87 Difference]: Start difference. First operand 447 states and 686 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) [2022-07-22 11:20:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:33,781 INFO L93 Difference]: Finished difference Result 991 states and 1521 transitions. [2022-07-22 11:20:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:33,781 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 [2022-07-22 11:20:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:33,783 INFO L225 Difference]: With dead ends: 991 [2022-07-22 11:20:33,783 INFO L226 Difference]: Without dead ends: 565 [2022-07-22 11:20:33,783 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:33,784 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:33,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 366 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:20:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-22 11:20:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 477. [2022-07-22 11:20:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5294117647058822) internal successors, (728), 476 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 728 transitions. [2022-07-22 11:20:33,791 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 728 transitions. Word has length 141 [2022-07-22 11:20:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:33,791 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 728 transitions. [2022-07-22 11:20:33,792 INFO L496 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) [2022-07-22 11:20:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 728 transitions. [2022-07-22 11:20:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:33,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:33,793 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:33,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 11:20:33,793 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1461975096, now seen corresponding path program 1 times [2022-07-22 11:20:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:33,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937531326] [2022-07-22 11:20:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:33,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937531326] [2022-07-22 11:20:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937531326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:33,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:33,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:33,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390651713] [2022-07-22 11:20:33,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:33,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:33,926 INFO L87 Difference]: Start difference. First operand 477 states and 728 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) [2022-07-22 11:20:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:34,539 INFO L93 Difference]: Finished difference Result 963 states and 1472 transitions. [2022-07-22 11:20:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:34,540 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 [2022-07-22 11:20:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:34,542 INFO L225 Difference]: With dead ends: 963 [2022-07-22 11:20:34,542 INFO L226 Difference]: Without dead ends: 507 [2022-07-22 11:20:34,542 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:34,543 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 67 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:34,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 521 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:20:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-07-22 11:20:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 477. [2022-07-22 11:20:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5273109243697478) internal successors, (727), 476 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) [2022-07-22 11:20:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 727 transitions. [2022-07-22 11:20:34,552 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 727 transitions. Word has length 142 [2022-07-22 11:20:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:34,552 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 727 transitions. [2022-07-22 11:20:34,553 INFO L496 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) [2022-07-22 11:20:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 727 transitions. [2022-07-22 11:20:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:34,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:34,554 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:34,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 11:20:34,554 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2035167520, now seen corresponding path program 1 times [2022-07-22 11:20:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094314227] [2022-07-22 11:20:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 11:20:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094314227] [2022-07-22 11:20:34,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094314227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:34,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:34,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874611050] [2022-07-22 11:20:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:34,655 INFO L87 Difference]: Start difference. First operand 477 states and 727 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) [2022-07-22 11:20:36,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:36,568 INFO L93 Difference]: Finished difference Result 961 states and 1468 transitions. [2022-07-22 11:20:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:36,568 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 [2022-07-22 11:20:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:36,570 INFO L225 Difference]: With dead ends: 961 [2022-07-22 11:20:36,570 INFO L226 Difference]: Without dead ends: 505 [2022-07-22 11:20:36,570 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:36,571 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 58 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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 [2022-07-22 11:20:36,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 523 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:20:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-22 11:20:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 477. [2022-07-22 11:20:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5252100840336134) internal successors, (726), 476 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 726 transitions. [2022-07-22 11:20:36,579 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 726 transitions. Word has length 142 [2022-07-22 11:20:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:36,579 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 726 transitions. [2022-07-22 11:20:36,579 INFO L496 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) [2022-07-22 11:20:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 726 transitions. [2022-07-22 11:20:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:36,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:36,580 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:36,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-22 11:20:36,581 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1801951302, now seen corresponding path program 1 times [2022-07-22 11:20:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285758458] [2022-07-22 11:20:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:20:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:36,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285758458] [2022-07-22 11:20:36,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285758458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:36,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:36,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892543185] [2022-07-22 11:20:36,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:36,669 INFO L87 Difference]: Start difference. First operand 477 states and 726 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:37,733 INFO L93 Difference]: Finished difference Result 1011 states and 1537 transitions. [2022-07-22 11:20:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 [2022-07-22 11:20:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:37,735 INFO L225 Difference]: With dead ends: 1011 [2022-07-22 11:20:37,735 INFO L226 Difference]: Without dead ends: 555 [2022-07-22 11:20:37,736 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:37,736 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 121 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:37,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 394 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:20:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-22 11:20:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 477. [2022-07-22 11:20:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5210084033613445) internal successors, (724), 476 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 724 transitions. [2022-07-22 11:20:37,744 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 724 transitions. Word has length 142 [2022-07-22 11:20:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:37,744 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 724 transitions. [2022-07-22 11:20:37,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 724 transitions. [2022-07-22 11:20:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 11:20:37,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:37,745 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:37,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-22 11:20:37,746 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash -279960039, now seen corresponding path program 1 times [2022-07-22 11:20:37,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:37,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501523286] [2022-07-22 11:20:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 11:20:37,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:37,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501523286] [2022-07-22 11:20:37,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501523286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:37,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:37,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:37,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226406347] [2022-07-22 11:20:37,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:37,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:37,861 INFO L87 Difference]: Start difference. First operand 477 states and 724 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) [2022-07-22 11:20:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:38,349 INFO L93 Difference]: Finished difference Result 1051 states and 1595 transitions. [2022-07-22 11:20:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:38,349 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 [2022-07-22 11:20:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:38,351 INFO L225 Difference]: With dead ends: 1051 [2022-07-22 11:20:38,351 INFO L226 Difference]: Without dead ends: 595 [2022-07-22 11:20:38,352 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:38,352 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 130 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:38,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 394 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:20:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-07-22 11:20:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 505. [2022-07-22 11:20:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.5099206349206349) internal successors, (761), 504 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 761 transitions. [2022-07-22 11:20:38,361 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 761 transitions. Word has length 144 [2022-07-22 11:20:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:38,362 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 761 transitions. [2022-07-22 11:20:38,362 INFO L496 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) [2022-07-22 11:20:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 761 transitions. [2022-07-22 11:20:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 11:20:38,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:38,363 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:38,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-22 11:20:38,363 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 504114503, now seen corresponding path program 1 times [2022-07-22 11:20:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:38,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394752375] [2022-07-22 11:20:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:38,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 11:20:38,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394752375] [2022-07-22 11:20:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394752375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:38,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366402341] [2022-07-22 11:20:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:38,445 INFO L87 Difference]: Start difference. First operand 505 states and 761 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) [2022-07-22 11:20:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:39,468 INFO L93 Difference]: Finished difference Result 1067 states and 1607 transitions. [2022-07-22 11:20:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:39,468 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 [2022-07-22 11:20:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:39,470 INFO L225 Difference]: With dead ends: 1067 [2022-07-22 11:20:39,470 INFO L226 Difference]: Without dead ends: 583 [2022-07-22 11:20:39,470 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:39,471 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:39,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 366 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:20:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-07-22 11:20:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 505. [2022-07-22 11:20:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.496031746031746) internal successors, (754), 504 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 754 transitions. [2022-07-22 11:20:39,479 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 754 transitions. Word has length 145 [2022-07-22 11:20:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:39,480 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 754 transitions. [2022-07-22 11:20:39,480 INFO L496 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) [2022-07-22 11:20:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 754 transitions. [2022-07-22 11:20:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 11:20:39,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:39,481 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 11:20:39,481 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash -423127345, now seen corresponding path program 1 times [2022-07-22 11:20:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:39,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327526154] [2022-07-22 11:20:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:20:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:39,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327526154] [2022-07-22 11:20:39,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327526154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:39,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:39,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263021157] [2022-07-22 11:20:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:39,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:39,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:39,564 INFO L87 Difference]: Start difference. First operand 505 states and 754 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:39,607 INFO L93 Difference]: Finished difference Result 1466 states and 2203 transitions. [2022-07-22 11:20:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:39,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 150 [2022-07-22 11:20:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:39,610 INFO L225 Difference]: With dead ends: 1466 [2022-07-22 11:20:39,610 INFO L226 Difference]: Without dead ends: 982 [2022-07-22 11:20:39,611 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:39,611 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 445 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 [2022-07-22 11:20:39,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 445 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-07-22 11:20:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2022-07-22 11:20:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.491335372069317) internal successors, (1463), 981 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1463 transitions. [2022-07-22 11:20:39,627 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1463 transitions. Word has length 150 [2022-07-22 11:20:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:39,627 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1463 transitions. [2022-07-22 11:20:39,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1463 transitions. [2022-07-22 11:20:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 11:20:39,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:39,629 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 11:20:39,629 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1461711919, now seen corresponding path program 1 times [2022-07-22 11:20:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020167342] [2022-07-22 11:20:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:39,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 11:20:39,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:39,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020167342] [2022-07-22 11:20:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020167342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:39,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:39,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953983290] [2022-07-22 11:20:39,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:39,718 INFO L87 Difference]: Start difference. First operand 982 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:39,757 INFO L93 Difference]: Finished difference Result 1970 states and 2938 transitions. [2022-07-22 11:20:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 150 [2022-07-22 11:20:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:39,760 INFO L225 Difference]: With dead ends: 1970 [2022-07-22 11:20:39,760 INFO L226 Difference]: Without dead ends: 1009 [2022-07-22 11:20:39,761 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:39,761 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:39,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 418 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-07-22 11:20:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1009. [2022-07-22 11:20:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 1.4861111111111112) internal successors, (1498), 1008 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1498 transitions. [2022-07-22 11:20:39,778 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1498 transitions. Word has length 150 [2022-07-22 11:20:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:39,778 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1498 transitions. [2022-07-22 11:20:39,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1498 transitions. [2022-07-22 11:20:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 11:20:39,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:39,780 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-22 11:20:39,781 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1885203411, now seen corresponding path program 1 times [2022-07-22 11:20:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:39,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434910130] [2022-07-22 11:20:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-22 11:20:39,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434910130] [2022-07-22 11:20:39,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434910130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:39,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:39,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:39,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393129351] [2022-07-22 11:20:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:39,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:39,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:39,852 INFO L87 Difference]: Start difference. First operand 1009 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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) [2022-07-22 11:20:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:39,887 INFO L93 Difference]: Finished difference Result 1999 states and 2974 transitions. [2022-07-22 11:20:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 150 [2022-07-22 11:20:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:39,890 INFO L225 Difference]: With dead ends: 1999 [2022-07-22 11:20:39,890 INFO L226 Difference]: Without dead ends: 1011 [2022-07-22 11:20:39,891 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:39,892 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:39,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 397 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-22 11:20:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2022-07-22 11:20:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.4851485148514851) internal successors, (1500), 1010 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1500 transitions. [2022-07-22 11:20:39,910 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1500 transitions. Word has length 150 [2022-07-22 11:20:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:39,910 INFO L495 AbstractCegarLoop]: Abstraction has 1011 states and 1500 transitions. [2022-07-22 11:20:39,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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) [2022-07-22 11:20:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1500 transitions. [2022-07-22 11:20:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 11:20:39,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:39,912 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-22 11:20:39,912 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1274245440, now seen corresponding path program 1 times [2022-07-22 11:20:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:39,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009995496] [2022-07-22 11:20:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:39,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-22 11:20:40,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009995496] [2022-07-22 11:20:40,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009995496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:40,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:40,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752657991] [2022-07-22 11:20:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:40,031 INFO L87 Difference]: Start difference. First operand 1011 states and 1500 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) [2022-07-22 11:20:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:40,091 INFO L93 Difference]: Finished difference Result 2474 states and 3690 transitions. [2022-07-22 11:20:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:40,091 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 [2022-07-22 11:20:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:40,095 INFO L225 Difference]: With dead ends: 2474 [2022-07-22 11:20:40,095 INFO L226 Difference]: Without dead ends: 1486 [2022-07-22 11:20:40,097 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:40,097 INFO L413 NwaCegarLoop]: 388 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, 577 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 [2022-07-22 11:20:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 577 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-07-22 11:20:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1486. [2022-07-22 11:20:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.4855218855218855) internal successors, (2206), 1485 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2206 transitions. [2022-07-22 11:20:40,135 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2206 transitions. Word has length 169 [2022-07-22 11:20:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:40,135 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2206 transitions. [2022-07-22 11:20:40,136 INFO L496 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) [2022-07-22 11:20:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2206 transitions. [2022-07-22 11:20:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-22 11:20:40,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:40,138 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:40,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-22 11:20:40,139 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1177340101, now seen corresponding path program 1 times [2022-07-22 11:20:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:40,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688517161] [2022-07-22 11:20:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:40,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:20:40,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688517161] [2022-07-22 11:20:40,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688517161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:40,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:40,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120367392] [2022-07-22 11:20:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:40,233 INFO L87 Difference]: Start difference. First operand 1486 states and 2206 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) [2022-07-22 11:20:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:40,320 INFO L93 Difference]: Finished difference Result 3392 states and 5053 transitions. [2022-07-22 11:20:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:40,320 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 [2022-07-22 11:20:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:40,326 INFO L225 Difference]: With dead ends: 3392 [2022-07-22 11:20:40,326 INFO L226 Difference]: Without dead ends: 1929 [2022-07-22 11:20:40,327 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:40,328 INFO L413 NwaCegarLoop]: 382 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, 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 [2022-07-22 11:20:40,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 571 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-07-22 11:20:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1929. [2022-07-22 11:20:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 1.4849585062240664) internal successors, (2863), 1928 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2863 transitions. [2022-07-22 11:20:40,362 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2863 transitions. Word has length 170 [2022-07-22 11:20:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:40,362 INFO L495 AbstractCegarLoop]: Abstraction has 1929 states and 2863 transitions. [2022-07-22 11:20:40,363 INFO L496 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) [2022-07-22 11:20:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2863 transitions. [2022-07-22 11:20:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-22 11:20:40,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:40,366 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:40,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-22 11:20:40,367 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1971855452, now seen corresponding path program 1 times [2022-07-22 11:20:40,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:40,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679687041] [2022-07-22 11:20:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-22 11:20:40,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679687041] [2022-07-22 11:20:40,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679687041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:40,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:40,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:40,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557147641] [2022-07-22 11:20:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:40,492 INFO L87 Difference]: Start difference. First operand 1929 states and 2863 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) [2022-07-22 11:20:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:40,572 INFO L93 Difference]: Finished difference Result 4317 states and 6427 transitions. [2022-07-22 11:20:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:40,572 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 [2022-07-22 11:20:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:40,599 INFO L225 Difference]: With dead ends: 4317 [2022-07-22 11:20:40,599 INFO L226 Difference]: Without dead ends: 2411 [2022-07-22 11:20:40,601 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:40,606 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:40,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 378 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-07-22 11:20:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2411. [2022-07-22 11:20:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 1.4867219917012449) internal successors, (3583), 2410 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3583 transitions. [2022-07-22 11:20:40,649 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3583 transitions. Word has length 252 [2022-07-22 11:20:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:40,649 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3583 transitions. [2022-07-22 11:20:40,649 INFO L496 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) [2022-07-22 11:20:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3583 transitions. [2022-07-22 11:20:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-22 11:20:40,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:40,653 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:40,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-22 11:20:40,654 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1276348089, now seen corresponding path program 1 times [2022-07-22 11:20:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039216685] [2022-07-22 11:20:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 474 proven. 106 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-22 11:20:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039216685] [2022-07-22 11:20:40,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039216685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299086228] [2022-07-22 11:20:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:40,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:40,836 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) [2022-07-22 11:20:40,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:20:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:20:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-22 11:20:41,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:20:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299086228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:41,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:20:41,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 11:20:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492778662] [2022-07-22 11:20:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:41,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:41,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:41,799 INFO L87 Difference]: Start difference. First operand 2411 states and 3583 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) [2022-07-22 11:20:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:41,873 INFO L93 Difference]: Finished difference Result 5281 states and 7867 transitions. [2022-07-22 11:20:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:41,873 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 [2022-07-22 11:20:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:41,891 INFO L225 Difference]: With dead ends: 5281 [2022-07-22 11:20:41,892 INFO L226 Difference]: Without dead ends: 2893 [2022-07-22 11:20:41,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:41,895 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:41,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 376 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-07-22 11:20:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2893. [2022-07-22 11:20:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 1.4885892116182573) internal successors, (4305), 2892 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4305 transitions. [2022-07-22 11:20:41,972 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4305 transitions. Word has length 294 [2022-07-22 11:20:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:41,972 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 4305 transitions. [2022-07-22 11:20:41,973 INFO L496 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) [2022-07-22 11:20:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4305 transitions. [2022-07-22 11:20:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-07-22 11:20:41,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:41,977 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-22 11:20:42,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:20:42,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-22 11:20:42,196 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash -142532707, now seen corresponding path program 1 times [2022-07-22 11:20:42,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523537354] [2022-07-22 11:20:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:42,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 820 proven. 106 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-22 11:20:42,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523537354] [2022-07-22 11:20:42,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523537354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783755802] [2022-07-22 11:20:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:42,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:42,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:42,349 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) [2022-07-22 11:20:42,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:20:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:20:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-22 11:20:43,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:20:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783755802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:43,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:20:43,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 11:20:43,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312046365] [2022-07-22 11:20:43,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:43,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:43,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:43,284 INFO L87 Difference]: Start difference. First operand 2893 states and 4305 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) [2022-07-22 11:20:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:43,368 INFO L93 Difference]: Finished difference Result 6245 states and 9311 transitions. [2022-07-22 11:20:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:43,369 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 [2022-07-22 11:20:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:43,374 INFO L225 Difference]: With dead ends: 6245 [2022-07-22 11:20:43,374 INFO L226 Difference]: Without dead ends: 3375 [2022-07-22 11:20:43,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:43,377 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:43,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 375 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-07-22 11:20:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3375. [2022-07-22 11:20:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3375 states, 3374 states have (on average 1.4902193242442205) internal successors, (5028), 3374 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 5028 transitions. [2022-07-22 11:20:43,453 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 5028 transitions. Word has length 379 [2022-07-22 11:20:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:43,453 INFO L495 AbstractCegarLoop]: Abstraction has 3375 states and 5028 transitions. [2022-07-22 11:20:43,453 INFO L496 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) [2022-07-22 11:20:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 5028 transitions. [2022-07-22 11:20:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-07-22 11:20:43,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:43,459 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:43,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 11:20:43,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-22 11:20:43,696 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 180850149, now seen corresponding path program 1 times [2022-07-22 11:20:43,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:43,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417966867] [2022-07-22 11:20:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 995 proven. 106 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-07-22 11:20:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417966867] [2022-07-22 11:20:43,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417966867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004533328] [2022-07-22 11:20:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:43,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:43,860 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) [2022-07-22 11:20:43,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:20:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:44,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:20:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2022-07-22 11:20:44,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:20:44,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004533328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:44,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:20:44,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 11:20:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747615733] [2022-07-22 11:20:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:44,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:44,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:44,770 INFO L87 Difference]: Start difference. First operand 3375 states and 5028 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) [2022-07-22 11:20:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:44,860 INFO L93 Difference]: Finished difference Result 7204 states and 10750 transitions. [2022-07-22 11:20:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:44,861 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 [2022-07-22 11:20:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:44,867 INFO L225 Difference]: With dead ends: 7204 [2022-07-22 11:20:44,867 INFO L226 Difference]: Without dead ends: 3852 [2022-07-22 11:20:44,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:44,871 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:44,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 577 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2022-07-22 11:20:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 3852. [2022-07-22 11:20:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 1.4894832511036094) internal successors, (5736), 3851 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 5736 transitions. [2022-07-22 11:20:44,956 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 5736 transitions. Word has length 422 [2022-07-22 11:20:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:44,956 INFO L495 AbstractCegarLoop]: Abstraction has 3852 states and 5736 transitions. [2022-07-22 11:20:44,957 INFO L496 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) [2022-07-22 11:20:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 5736 transitions. [2022-07-22 11:20:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-22 11:20:44,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:44,962 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:44,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:20:45,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:45,172 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:45,172 INFO L85 PathProgramCache]: Analyzing trace with hash -676054420, now seen corresponding path program 1 times [2022-07-22 11:20:45,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:45,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619279639] [2022-07-22 11:20:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:45,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 1003 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-07-22 11:20:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:45,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619279639] [2022-07-22 11:20:45,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619279639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:45,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:45,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:45,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320387093] [2022-07-22 11:20:45,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:45,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:45,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:45,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:45,319 INFO L87 Difference]: Start difference. First operand 3852 states and 5736 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:47,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:47,324 INFO L93 Difference]: Finished difference Result 8334 states and 12347 transitions. [2022-07-22 11:20:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 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 [2022-07-22 11:20:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:47,332 INFO L225 Difference]: With dead ends: 8334 [2022-07-22 11:20:47,332 INFO L226 Difference]: Without dead ends: 4505 [2022-07-22 11:20:47,336 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:47,336 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 62 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:47,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 659 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:20:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-07-22 11:20:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4180. [2022-07-22 11:20:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 4179 states have (on average 1.4893515195022733) internal successors, (6224), 4179 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 6224 transitions. [2022-07-22 11:20:47,410 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 6224 transitions. Word has length 423 [2022-07-22 11:20:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:47,410 INFO L495 AbstractCegarLoop]: Abstraction has 4180 states and 6224 transitions. [2022-07-22 11:20:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 6224 transitions. [2022-07-22 11:20:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-22 11:20:47,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:47,417 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:47,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-22 11:20:47,418 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2009734672, now seen corresponding path program 1 times [2022-07-22 11:20:47,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:47,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344860213] [2022-07-22 11:20:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2022-07-22 11:20:47,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344860213] [2022-07-22 11:20:47,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344860213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:47,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:47,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:47,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433375154] [2022-07-22 11:20:47,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:47,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:47,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:47,620 INFO L87 Difference]: Start difference. First operand 4180 states and 6224 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) [2022-07-22 11:20:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:47,717 INFO L93 Difference]: Finished difference Result 8823 states and 13154 transitions. [2022-07-22 11:20:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:47,717 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 [2022-07-22 11:20:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:47,724 INFO L225 Difference]: With dead ends: 8823 [2022-07-22 11:20:47,725 INFO L226 Difference]: Without dead ends: 4666 [2022-07-22 11:20:47,729 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:47,729 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:47,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 577 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2022-07-22 11:20:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4666. [2022-07-22 11:20:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 4665 states have (on average 1.4885316184351554) internal successors, (6944), 4665 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 6944 transitions. [2022-07-22 11:20:47,806 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 6944 transitions. Word has length 423 [2022-07-22 11:20:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:47,806 INFO L495 AbstractCegarLoop]: Abstraction has 4666 states and 6944 transitions. [2022-07-22 11:20:47,807 INFO L496 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) [2022-07-22 11:20:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 6944 transitions. [2022-07-22 11:20:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-07-22 11:20:47,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:47,814 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:47,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-22 11:20:47,814 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:47,814 INFO L85 PathProgramCache]: Analyzing trace with hash -61188847, now seen corresponding path program 1 times [2022-07-22 11:20:47,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:47,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127800067] [2022-07-22 11:20:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:47,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2318 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2022-07-22 11:20:48,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:48,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127800067] [2022-07-22 11:20:48,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127800067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:48,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:48,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:48,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288084958] [2022-07-22 11:20:48,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:48,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:48,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:48,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:48,033 INFO L87 Difference]: Start difference. First operand 4666 states and 6944 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) [2022-07-22 11:20:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:48,161 INFO L93 Difference]: Finished difference Result 9832 states and 14650 transitions. [2022-07-22 11:20:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:48,162 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 [2022-07-22 11:20:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:48,169 INFO L225 Difference]: With dead ends: 9832 [2022-07-22 11:20:48,169 INFO L226 Difference]: Without dead ends: 5189 [2022-07-22 11:20:48,173 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:20:48,173 INFO L413 NwaCegarLoop]: 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 [2022-07-22 11:20:48,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 372 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2022-07-22 11:20:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 5189. [2022-07-22 11:20:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 5188 states have (on average 1.4901696222050886) internal successors, (7731), 5188 states have internal predecessors, (7731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 7731 transitions. [2022-07-22 11:20:48,253 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 7731 transitions. Word has length 509 [2022-07-22 11:20:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:48,253 INFO L495 AbstractCegarLoop]: Abstraction has 5189 states and 7731 transitions. [2022-07-22 11:20:48,253 INFO L496 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) [2022-07-22 11:20:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 7731 transitions. [2022-07-22 11:20:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-07-22 11:20:48,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:48,260 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:48,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-22 11:20:48,260 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash 600999647, now seen corresponding path program 1 times [2022-07-22 11:20:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628182325] [2022-07-22 11:20:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1400 proven. 48 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-07-22 11:20:48,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:48,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628182325] [2022-07-22 11:20:48,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628182325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:48,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130092018] [2022-07-22 11:20:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:48,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:48,703 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) [2022-07-22 11:20:48,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:20:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:49,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2422 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 11:20:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:49,775 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:20:49,776 INFO L390 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 [2022-07-22 11:20:49,860 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-22 11:20:49,860 INFO L390 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 [2022-07-22 11:20:49,916 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:20:49,916 INFO L390 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 [2022-07-22 11:20:49,972 INFO L390 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 [2022-07-22 11:20:49,997 INFO L390 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 [2022-07-22 11:20:50,001 INFO L390 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 [2022-07-22 11:20:50,028 INFO L356 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2022-07-22 11:20:50,028 INFO L390 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 [2022-07-22 11:20:50,088 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-22 11:20:50,088 INFO L390 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 [2022-07-22 11:20:50,268 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:20:50,269 INFO L390 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 [2022-07-22 11:20:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1394 proven. 204 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2022-07-22 11:20:50,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:20:50,416 INFO L390 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 [2022-07-22 11:20:50,422 INFO L390 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 [2022-07-22 11:20:52,470 INFO L390 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 100 treesize of output 88 [2022-07-22 11:20:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1392 proven. 0 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2022-07-22 11:20:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130092018] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:52,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:20:52,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 14] total 20 [2022-07-22 11:20:52,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272641467] [2022-07-22 11:20:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:52,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:20:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:20:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-22 11:20:52,492 INFO L87 Difference]: Start difference. First operand 5189 states and 7731 transitions. Second operand has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:54,500 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 [] [2022-07-22 11:20:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:59,549 INFO L93 Difference]: Finished difference Result 14067 states and 20912 transitions. [2022-07-22 11:20:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:20:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 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 [2022-07-22 11:20:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:59,561 INFO L225 Difference]: With dead ends: 14067 [2022-07-22 11:20:59,562 INFO L226 Difference]: Without dead ends: 8901 [2022-07-22 11:20:59,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1098 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:20:59,566 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 408 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 114 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:59,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 893 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 538 Invalid, 1 Unknown, 269 Unchecked, 3.2s Time] [2022-07-22 11:20:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2022-07-22 11:20:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 7594. [2022-07-22 11:20:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7593 states have (on average 1.5029632556301857) internal successors, (11412), 7593 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 11412 transitions. [2022-07-22 11:20:59,719 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 11412 transitions. Word has length 553 [2022-07-22 11:20:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:59,720 INFO L495 AbstractCegarLoop]: Abstraction has 7594 states and 11412 transitions. [2022-07-22 11:20:59,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 11412 transitions. [2022-07-22 11:20:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-07-22 11:20:59,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:59,732 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:20:59,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:20:59,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-22 11:20:59,955 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2030253142, now seen corresponding path program 1 times [2022-07-22 11:20:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050028048] [2022-07-22 11:20:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:59,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 1532 proven. 0 refuted. 0 times theorem prover too weak. 1235 trivial. 0 not checked. [2022-07-22 11:21:00,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050028048] [2022-07-22 11:21:00,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050028048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:00,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:00,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312337929] [2022-07-22 11:21:00,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:00,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:00,190 INFO L87 Difference]: Start difference. First operand 7594 states and 11412 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) [2022-07-22 11:21:01,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:01,746 INFO L93 Difference]: Finished difference Result 15687 states and 23455 transitions. [2022-07-22 11:21:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:01,746 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 [2022-07-22 11:21:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:01,757 INFO L225 Difference]: With dead ends: 15687 [2022-07-22 11:21:01,757 INFO L226 Difference]: Without dead ends: 8116 [2022-07-22 11:21:01,766 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:01,766 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 60 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:01,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 657 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:21:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8116 states. [2022-07-22 11:21:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8116 to 7604. [2022-07-22 11:21:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7604 states, 7603 states have (on average 1.5023017230040774) internal successors, (11422), 7603 states have internal predecessors, (11422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7604 states to 7604 states and 11422 transitions. [2022-07-22 11:21:01,974 INFO L78 Accepts]: Start accepts. Automaton has 7604 states and 11422 transitions. Word has length 556 [2022-07-22 11:21:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:01,974 INFO L495 AbstractCegarLoop]: Abstraction has 7604 states and 11422 transitions. [2022-07-22 11:21:01,974 INFO L496 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) [2022-07-22 11:21:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7604 states and 11422 transitions. [2022-07-22 11:21:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-07-22 11:21:01,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:01,985 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 11, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:21:01,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-22 11:21:01,985 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash -491957639, now seen corresponding path program 1 times [2022-07-22 11:21:01,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:01,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213831433] [2022-07-22 11:21:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 1848 proven. 21 refuted. 0 times theorem prover too weak. 1359 trivial. 0 not checked. [2022-07-22 11:21:02,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213831433] [2022-07-22 11:21:02,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213831433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539042582] [2022-07-22 11:21:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:02,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:02,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:02,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:02,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:21:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:21:03,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 2175 proven. 0 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-07-22 11:21:03,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:21:03,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539042582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:03,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:21:03,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 11:21:03,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842507401] [2022-07-22 11:21:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:03,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:21:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:21:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:21:03,405 INFO L87 Difference]: Start difference. First operand 7604 states and 11422 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:03,563 INFO L93 Difference]: Finished difference Result 16102 states and 24204 transitions. [2022-07-22 11:21:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:21:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 598 [2022-07-22 11:21:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:03,573 INFO L225 Difference]: With dead ends: 16102 [2022-07-22 11:21:03,574 INFO L226 Difference]: Without dead ends: 8521 [2022-07-22 11:21:03,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:21:03,581 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 154 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:03,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 377 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:21:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8521 states. [2022-07-22 11:21:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8521 to 8521. [2022-07-22 11:21:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 8520 states have (on average 1.503169014084507) internal successors, (12807), 8520 states have internal predecessors, (12807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12807 transitions. [2022-07-22 11:21:03,784 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12807 transitions. Word has length 598 [2022-07-22 11:21:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:03,784 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12807 transitions. [2022-07-22 11:21:03,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12807 transitions. [2022-07-22 11:21:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-07-22 11:21:03,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:03,797 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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, 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] [2022-07-22 11:21:03,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:21:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:03,999 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1880698354, now seen corresponding path program 1 times [2022-07-22 11:21:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42374849] [2022-07-22 11:21:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 1441 proven. 0 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2022-07-22 11:21:04,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:04,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42374849] [2022-07-22 11:21:04,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42374849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:04,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:04,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012514737] [2022-07-22 11:21:04,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:04,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:04,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:04,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:04,198 INFO L87 Difference]: Start difference. First operand 8521 states and 12807 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:05,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:06,398 INFO L93 Difference]: Finished difference Result 17481 states and 26170 transitions. [2022-07-22 11:21:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 601 [2022-07-22 11:21:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:06,409 INFO L225 Difference]: With dead ends: 17481 [2022-07-22 11:21:06,409 INFO L226 Difference]: Without dead ends: 8983 [2022-07-22 11:21:06,417 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:06,417 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 81 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:06,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 643 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:21:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2022-07-22 11:21:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 8521. [2022-07-22 11:21:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 8520 states have (on average 1.501056338028169) internal successors, (12789), 8520 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12789 transitions. [2022-07-22 11:21:06,643 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12789 transitions. Word has length 601 [2022-07-22 11:21:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:06,643 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12789 transitions. [2022-07-22 11:21:06,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12789 transitions. [2022-07-22 11:21:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-07-22 11:21:06,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:06,656 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:06,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-22 11:21:06,657 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash 104446311, now seen corresponding path program 1 times [2022-07-22 11:21:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611671863] [2022-07-22 11:21:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3529 backedges. 1681 proven. 0 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2022-07-22 11:21:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611671863] [2022-07-22 11:21:06,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611671863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:06,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:06,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:06,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931048251] [2022-07-22 11:21:06,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:06,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:06,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:06,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:06,868 INFO L87 Difference]: Start difference. First operand 8521 states and 12789 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) [2022-07-22 11:21:07,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:08,326 INFO L93 Difference]: Finished difference Result 17481 states and 26134 transitions. [2022-07-22 11:21:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:08,326 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 [2022-07-22 11:21:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:08,337 INFO L225 Difference]: With dead ends: 17481 [2022-07-22 11:21:08,337 INFO L226 Difference]: Without dead ends: 8983 [2022-07-22 11:21:08,345 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:08,345 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 71 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:08,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 641 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:21:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2022-07-22 11:21:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 8521. [2022-07-22 11:21:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 8520 states have (on average 1.498943661971831) internal successors, (12771), 8520 states have internal predecessors, (12771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12771 transitions. [2022-07-22 11:21:08,539 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12771 transitions. Word has length 619 [2022-07-22 11:21:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:08,539 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12771 transitions. [2022-07-22 11:21:08,539 INFO L496 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) [2022-07-22 11:21:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12771 transitions. [2022-07-22 11:21:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-07-22 11:21:08,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:08,548 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 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, 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] [2022-07-22 11:21:08,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-22 11:21:08,548 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2144528921, now seen corresponding path program 1 times [2022-07-22 11:21:08,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:08,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096425034] [2022-07-22 11:21:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3586 backedges. 1931 proven. 46 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2022-07-22 11:21:08,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096425034] [2022-07-22 11:21:08,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096425034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721223179] [2022-07-22 11:21:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:08,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:08,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:08,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:08,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:21:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:21:09,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:09,948 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:09,948 INFO L390 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 [2022-07-22 11:21:09,975 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:21:09,975 INFO L390 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 [2022-07-22 11:21:09,996 INFO L390 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 [2022-07-22 11:21:10,007 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:10,007 INFO L390 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 [2022-07-22 11:21:10,065 INFO L390 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 [2022-07-22 11:21:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3586 backedges. 1926 proven. 126 refuted. 0 times theorem prover too weak. 1534 trivial. 0 not checked. [2022-07-22 11:21:10,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:21:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3586 backedges. 1947 proven. 0 refuted. 0 times theorem prover too weak. 1639 trivial. 0 not checked. [2022-07-22 11:21:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721223179] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:10,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:21:10,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-22 11:21:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682545060] [2022-07-22 11:21:10,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:21:10,132 INFO L87 Difference]: Start difference. First operand 8521 states and 12771 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:11,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:11,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:11,863 INFO L93 Difference]: Finished difference Result 18216 states and 27145 transitions. [2022-07-22 11:21:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 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 [2022-07-22 11:21:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:11,875 INFO L225 Difference]: With dead ends: 18216 [2022-07-22 11:21:11,875 INFO L226 Difference]: Without dead ends: 9718 [2022-07-22 11:21:11,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 1236 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:21:11,878 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 116 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:11,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 481 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:21:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9718 states. [2022-07-22 11:21:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9718 to 8532. [2022-07-22 11:21:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8532 states, 8531 states have (on average 1.498300316492791) internal successors, (12782), 8531 states have internal predecessors, (12782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8532 states to 8532 states and 12782 transitions. [2022-07-22 11:21:12,077 INFO L78 Accepts]: Start accepts. Automaton has 8532 states and 12782 transitions. Word has length 619 [2022-07-22 11:21:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:12,077 INFO L495 AbstractCegarLoop]: Abstraction has 8532 states and 12782 transitions. [2022-07-22 11:21:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 8532 states and 12782 transitions. [2022-07-22 11:21:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-07-22 11:21:12,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:12,088 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:12,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:21:12,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:12,294 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:12,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1851564773, now seen corresponding path program 1 times [2022-07-22 11:21:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:12,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265877142] [2022-07-22 11:21:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 1701 proven. 0 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2022-07-22 11:21:12,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265877142] [2022-07-22 11:21:12,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265877142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:12,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:12,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:12,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410125075] [2022-07-22 11:21:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:12,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:12,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:12,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:12,466 INFO L87 Difference]: Start difference. First operand 8532 states and 12782 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) [2022-07-22 11:21:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:13,506 INFO L93 Difference]: Finished difference Result 17431 states and 26018 transitions. [2022-07-22 11:21:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:13,506 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 [2022-07-22 11:21:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:13,517 INFO L225 Difference]: With dead ends: 17431 [2022-07-22 11:21:13,517 INFO L226 Difference]: Without dead ends: 8922 [2022-07-22 11:21:13,525 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:13,525 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 65 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:13,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 633 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:21:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8922 states. [2022-07-22 11:21:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8922 to 8532. [2022-07-22 11:21:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8532 states, 8531 states have (on average 1.4961903645528074) internal successors, (12764), 8531 states have internal predecessors, (12764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8532 states to 8532 states and 12764 transitions. [2022-07-22 11:21:13,714 INFO L78 Accepts]: Start accepts. Automaton has 8532 states and 12764 transitions. Word has length 622 [2022-07-22 11:21:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:13,714 INFO L495 AbstractCegarLoop]: Abstraction has 8532 states and 12764 transitions. [2022-07-22 11:21:13,715 INFO L496 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) [2022-07-22 11:21:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8532 states and 12764 transitions. [2022-07-22 11:21:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-07-22 11:21:13,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:13,727 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 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, 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] [2022-07-22 11:21:13,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-22 11:21:13,727 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:13,728 INFO L85 PathProgramCache]: Analyzing trace with hash 777098214, now seen corresponding path program 1 times [2022-07-22 11:21:13,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:13,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746662116] [2022-07-22 11:21:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 1836 proven. 0 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-07-22 11:21:13,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746662116] [2022-07-22 11:21:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746662116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:13,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:13,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:13,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397458883] [2022-07-22 11:21:13,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:13,968 INFO L87 Difference]: Start difference. First operand 8532 states and 12764 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:15,976 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 [] [2022-07-22 11:21:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:16,312 INFO L93 Difference]: Finished difference Result 17855 states and 26667 transitions. [2022-07-22 11:21:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 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 [2022-07-22 11:21:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:16,323 INFO L225 Difference]: With dead ends: 17855 [2022-07-22 11:21:16,323 INFO L226 Difference]: Without dead ends: 9346 [2022-07-22 11:21:16,329 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:16,330 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 36 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:16,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 587 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:21:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2022-07-22 11:21:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 9000. [2022-07-22 11:21:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9000 states, 8999 states have (on average 1.4963884876097344) internal successors, (13466), 8999 states have internal predecessors, (13466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 13466 transitions. [2022-07-22 11:21:16,509 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 13466 transitions. Word has length 622 [2022-07-22 11:21:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:16,509 INFO L495 AbstractCegarLoop]: Abstraction has 9000 states and 13466 transitions. [2022-07-22 11:21:16,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 13466 transitions. [2022-07-22 11:21:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-22 11:21:16,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:16,520 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:16,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-22 11:21:16,520 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1689715661, now seen corresponding path program 1 times [2022-07-22 11:21:16,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:16,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586763169] [2022-07-22 11:21:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:16,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1991 proven. 0 refuted. 0 times theorem prover too weak. 1904 trivial. 0 not checked. [2022-07-22 11:21:16,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:16,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586763169] [2022-07-22 11:21:16,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586763169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:16,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:16,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:21:16,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818205612] [2022-07-22 11:21:16,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:16,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:21:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:21:16,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:21:16,914 INFO L87 Difference]: Start difference. First operand 9000 states and 13466 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) [2022-07-22 11:21:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:18,343 INFO L93 Difference]: Finished difference Result 22163 states and 33133 transitions. [2022-07-22 11:21:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:21:18,343 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 [2022-07-22 11:21:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:18,358 INFO L225 Difference]: With dead ends: 22163 [2022-07-22 11:21:18,358 INFO L226 Difference]: Without dead ends: 13186 [2022-07-22 11:21:18,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:21:18,366 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 112 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:18,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 948 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:21:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13186 states. [2022-07-22 11:21:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13186 to 9970. [2022-07-22 11:21:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9969 states have (on average 1.490921857759053) internal successors, (14863), 9969 states have internal predecessors, (14863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 14863 transitions. [2022-07-22 11:21:18,615 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 14863 transitions. Word has length 640 [2022-07-22 11:21:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:18,615 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 14863 transitions. [2022-07-22 11:21:18,615 INFO L496 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) [2022-07-22 11:21:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 14863 transitions. [2022-07-22 11:21:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-22 11:21:18,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:18,628 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:18,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-22 11:21:18,628 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1862113509, now seen corresponding path program 1 times [2022-07-22 11:21:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:18,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530986263] [2022-07-22 11:21:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:18,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1898 proven. 0 refuted. 0 times theorem prover too weak. 1793 trivial. 0 not checked. [2022-07-22 11:21:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:18,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530986263] [2022-07-22 11:21:18,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530986263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:18,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:18,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102639809] [2022-07-22 11:21:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:18,844 INFO L87 Difference]: Start difference. First operand 9970 states and 14863 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) [2022-07-22 11:21:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:20,201 INFO L93 Difference]: Finished difference Result 20449 states and 30437 transitions. [2022-07-22 11:21:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:20,202 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 [2022-07-22 11:21:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:20,212 INFO L225 Difference]: With dead ends: 20449 [2022-07-22 11:21:20,212 INFO L226 Difference]: Without dead ends: 10502 [2022-07-22 11:21:20,217 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:20,217 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 47 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:20,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 598 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 11:21:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10502 states. [2022-07-22 11:21:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10502 to 9970. [2022-07-22 11:21:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9969 states have (on average 1.4889156384792859) internal successors, (14843), 9969 states have internal predecessors, (14843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 14843 transitions. [2022-07-22 11:21:20,452 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 14843 transitions. Word has length 640 [2022-07-22 11:21:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:20,452 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 14843 transitions. [2022-07-22 11:21:20,452 INFO L496 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) [2022-07-22 11:21:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 14843 transitions. [2022-07-22 11:21:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-22 11:21:20,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:20,463 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:20,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-22 11:21:20,463 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 819285376, now seen corresponding path program 1 times [2022-07-22 11:21:20,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:20,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826402221] [2022-07-22 11:21:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3871 backedges. 2015 proven. 0 refuted. 0 times theorem prover too weak. 1856 trivial. 0 not checked. [2022-07-22 11:21:20,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826402221] [2022-07-22 11:21:20,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826402221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:20,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:20,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715489125] [2022-07-22 11:21:20,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:20,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:20,658 INFO L87 Difference]: Start difference. First operand 9970 states and 14843 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) [2022-07-22 11:21:22,021 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 [] [2022-07-22 11:21:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:22,471 INFO L93 Difference]: Finished difference Result 21029 states and 31237 transitions. [2022-07-22 11:21:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:22,471 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 [2022-07-22 11:21:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:22,484 INFO L225 Difference]: With dead ends: 21029 [2022-07-22 11:21:22,484 INFO L226 Difference]: Without dead ends: 11082 [2022-07-22 11:21:22,491 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:22,491 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 41 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:22,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 619 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:21:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2022-07-22 11:21:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10610. [2022-07-22 11:21:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 1.489584315204072) internal successors, (15803), 10609 states have internal predecessors, (15803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 15803 transitions. [2022-07-22 11:21:22,723 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 15803 transitions. Word has length 640 [2022-07-22 11:21:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:22,724 INFO L495 AbstractCegarLoop]: Abstraction has 10610 states and 15803 transitions. [2022-07-22 11:21:22,724 INFO L496 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) [2022-07-22 11:21:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 15803 transitions. [2022-07-22 11:21:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-22 11:21:22,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:22,735 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:22,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-22 11:21:22,735 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:22,735 INFO L85 PathProgramCache]: Analyzing trace with hash 430388367, now seen corresponding path program 1 times [2022-07-22 11:21:22,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:22,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892325557] [2022-07-22 11:21:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-07-22 11:21:23,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:23,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892325557] [2022-07-22 11:21:23,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892325557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:23,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:21:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364201467] [2022-07-22 11:21:23,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:23,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:21:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:21:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:21:23,798 INFO L87 Difference]: Start difference. First operand 10610 states and 15803 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) [2022-07-22 11:21:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:25,041 INFO L93 Difference]: Finished difference Result 21217 states and 31602 transitions. [2022-07-22 11:21:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:21:25,042 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 [2022-07-22 11:21:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:25,052 INFO L225 Difference]: With dead ends: 21217 [2022-07-22 11:21:25,052 INFO L226 Difference]: Without dead ends: 10610 [2022-07-22 11:21:25,057 INFO L412 NwaCegarLoop]: 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 [2022-07-22 11:21:25,057 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 7 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:25,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 703 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:21:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2022-07-22 11:21:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 10610. [2022-07-22 11:21:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 1.4894900556131587) internal successors, (15802), 10609 states have internal predecessors, (15802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 15802 transitions. [2022-07-22 11:21:25,266 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 15802 transitions. Word has length 640 [2022-07-22 11:21:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:25,266 INFO L495 AbstractCegarLoop]: Abstraction has 10610 states and 15802 transitions. [2022-07-22 11:21:25,266 INFO L496 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) [2022-07-22 11:21:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 15802 transitions. [2022-07-22 11:21:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-22 11:21:25,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:25,277 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:21:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-22 11:21:25,277 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -582769715, now seen corresponding path program 1 times [2022-07-22 11:21:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:25,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578716358] [2022-07-22 11:21:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 2142 proven. 1109 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-07-22 11:21:27,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578716358] [2022-07-22 11:21:27,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578716358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362558003] [2022-07-22 11:21:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:27,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:27,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:27,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:21:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-22 11:21:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:28,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:21:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:28,861 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 11:21:28,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2022-07-22 11:21:28,941 INFO L390 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 [2022-07-22 11:21:29,061 INFO L390 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 [2022-07-22 11:21:29,316 INFO L390 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 [2022-07-22 11:21:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:29,379 INFO L390 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 [2022-07-22 11:21:29,401 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-22 11:21:29,401 INFO L390 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 [2022-07-22 11:21:29,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:29,407 INFO L390 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 85 treesize of output 72 [2022-07-22 11:21:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:29,962 INFO L390 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 [2022-07-22 11:21:29,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:29,967 INFO L390 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 [2022-07-22 11:21:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:29,991 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-22 11:21:29,992 INFO L390 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 [2022-07-22 11:21:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:30,056 INFO L390 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 [2022-07-22 11:21:30,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:30,084 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-22 11:21:30,084 INFO L390 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 [2022-07-22 11:21:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:30,091 INFO L390 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 [2022-07-22 11:21:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:30,820 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-22 11:21:30,820 INFO L390 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 [2022-07-22 11:21:30,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:30,853 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-22 11:21:30,854 INFO L390 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 [2022-07-22 11:21:30,904 INFO L356 Elim1Store]: treesize reduction 45, result has 52.6 percent of original size [2022-07-22 11:21:30,904 INFO L390 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 40 treesize of output 73 [2022-07-22 11:21:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,298 INFO L390 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 395 treesize of output 317 [2022-07-22 11:21:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,337 INFO L356 Elim1Store]: treesize reduction 148, result has 30.2 percent of original size [2022-07-22 11:21:32,337 INFO L390 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 395 treesize of output 408 [2022-07-22 11:21:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:32,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 11:21:32,402 INFO L390 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 1 case distinctions, treesize of input 423 treesize of output 339 [2022-07-22 11:21:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,504 INFO L390 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 390 treesize of output 308 [2022-07-22 11:21:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,519 INFO L390 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 390 treesize of output 308 [2022-07-22 11:21:38,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,541 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-22 11:21:38,541 INFO L390 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 390 treesize of output 378 [2022-07-22 11:21:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,749 INFO L390 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 139 treesize of output 97 [2022-07-22 11:21:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,754 INFO L390 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 97 treesize of output 61 [2022-07-22 11:21:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,781 INFO L356 Elim1Store]: treesize reduction 89, result has 25.2 percent of original size [2022-07-22 11:21:38,781 INFO L390 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 5 case distinctions, treesize of input 80 treesize of output 87 [2022-07-22 11:21:38,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:38,836 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 11:21:38,836 INFO L390 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 1 case distinctions, treesize of input 33 treesize of output 35 [2022-07-22 11:21:38,996 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 11:21:38,996 INFO L390 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 1 case distinctions, treesize of input 23 treesize of output 11 [2022-07-22 11:21:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1540 proven. 545 refuted. 0 times theorem prover too weak. 1810 trivial. 0 not checked. [2022-07-22 11:21:39,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:21:41,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:41,611 INFO L390 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 262 treesize of output 202 [2022-07-22 11:21:41,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:41,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:41,615 INFO L390 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 214 treesize of output 154 [2022-07-22 11:21:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1689 proven. 141 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2022-07-22 11:21:44,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362558003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:21:44,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:21:44,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 13] total 47 [2022-07-22 11:21:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467675414] [2022-07-22 11:21:44,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:21:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 11:21:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:44,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 11:21:44,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 11:21:44,878 INFO L87 Difference]: Start difference. First operand 10610 states and 15802 transitions. Second operand has 47 states, 47 states have (on average 17.404255319148938) internal successors, (818), 47 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:46,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:48,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:54,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:55,560 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 [] [2022-07-22 11:22:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:22:59,267 INFO L93 Difference]: Finished difference Result 178069 states and 255815 transitions. [2022-07-22 11:22:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2022-07-22 11:22:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 17.404255319148938) internal successors, (818), 47 states have internal predecessors, (818), 0 states have call successors, (0), 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 [2022-07-22 11:22:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:22:59,473 INFO L225 Difference]: With dead ends: 178069 [2022-07-22 11:22:59,473 INFO L226 Difference]: Without dead ends: 167482 [2022-07-22 11:22:59,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2099 GetRequests, 1561 SyntacticMatches, 29 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118532 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=26573, Invalid=234037, Unknown=0, NotChecked=0, Total=260610 [2022-07-22 11:22:59,517 INFO L413 NwaCegarLoop]: 1347 mSDtfsCounter, 10948 mSDsluCounter, 26715 mSDsCounter, 0 mSdLazyCounter, 26827 mSolverCounterSat, 2484 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10948 SdHoareTripleChecker+Valid, 28062 SdHoareTripleChecker+Invalid, 36617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2484 IncrementalHoareTripleChecker+Valid, 26827 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7305 IncrementalHoareTripleChecker+Unchecked, 38.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:22:59,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10948 Valid, 28062 Invalid, 36617 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2484 Valid, 26827 Invalid, 1 Unknown, 7305 Unchecked, 38.0s Time] [2022-07-22 11:22:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167482 states. [2022-07-22 11:23:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167482 to 98222. [2022-07-22 11:23:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98222 states, 98221 states have (on average 1.4891112898463668) internal successors, (146262), 98221 states have internal predecessors, (146262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:23:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98222 states to 98222 states and 146262 transitions. [2022-07-22 11:23:03,381 INFO L78 Accepts]: Start accepts. Automaton has 98222 states and 146262 transitions. Word has length 640 [2022-07-22 11:23:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:23:03,381 INFO L495 AbstractCegarLoop]: Abstraction has 98222 states and 146262 transitions. [2022-07-22 11:23:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 17.404255319148938) internal successors, (818), 47 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:23:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 98222 states and 146262 transitions. [2022-07-22 11:23:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2022-07-22 11:23:03,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:23:03,576 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 15, 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, 1, 1, 1, 1, 1] [2022-07-22 11:23:03,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 11:23:03,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:23:03,776 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:23:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:23:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1543686213, now seen corresponding path program 1 times [2022-07-22 11:23:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:23:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618818559] [2022-07-22 11:23:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:23:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:23:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:23:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1586 proven. 277 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-22 11:23:04,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:23:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618818559] [2022-07-22 11:23:04,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618818559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:23:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735514150] [2022-07-22 11:23:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:23:04,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:23:04,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:23:04,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:23:04,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 11:23:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:23:06,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 11:23:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:23:06,343 INFO L390 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 [2022-07-22 11:23:06,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,506 INFO L390 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 36 treesize of output 35 [2022-07-22 11:23:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,509 INFO L390 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 36 treesize of output 35 [2022-07-22 11:23:06,530 INFO L356 Elim1Store]: treesize reduction 102, result has 34.2 percent of original size [2022-07-22 11:23:06,530 INFO L390 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 [2022-07-22 11:23:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,809 INFO L390 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 [2022-07-22 11:23:06,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,829 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-22 11:23:06,829 INFO L390 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 67 treesize of output 91 [2022-07-22 11:23:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,832 INFO L390 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 83 treesize of output 70 [2022-07-22 11:23:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,849 INFO L390 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 [2022-07-22 11:23:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:23:06,855 INFO L390 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 [2022-07-22 11:23:06,874 INFO L356 Elim1Store]: treesize reduction 75, result has 37.5 percent of original size [2022-07-22 11:23:06,875 INFO L390 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 67 treesize of output 83 [2022-07-22 11:23:06,919 INFO L390 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 89 treesize of output 65 [2022-07-22 11:23:06,921 INFO L390 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 65 treesize of output 41 [2022-07-22 11:23:09,004 INFO L390 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 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-22 11:23:09,042 INFO L390 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 [2022-07-22 11:23:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1997 proven. 87 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2022-07-22 11:23:09,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:23:10,035 INFO L390 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 32 treesize of output 20 [2022-07-22 11:23:10,039 INFO L390 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 28 treesize of output 16 [2022-07-22 11:23:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1997 proven. 62 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2022-07-22 11:23:10,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735514150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:23:10,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:23:10,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 30 [2022-07-22 11:23:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157359333] [2022-07-22 11:23:10,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:23:10,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 11:23:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:23:10,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 11:23:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-07-22 11:23:10,051 INFO L87 Difference]: Start difference. First operand 98222 states and 146262 transitions. Second operand has 30 states, 30 states have (on average 17.433333333333334) internal successors, (523), 30 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:23:12,064 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 [] [2022-07-22 11:23:13,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:23:17,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:23:18,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:23:20,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []