./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:58:02,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:58:02,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:58:03,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:58:03,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:58:03,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:58:03,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:58:03,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:58:03,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:58:03,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:58:03,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:58:03,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:58:03,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:58:03,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:58:03,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:58:03,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:58:03,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:58:03,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:58:03,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:58:03,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:58:03,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:58:03,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:58:03,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:58:03,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:58:03,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:58:03,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:58:03,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:58:03,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:58:03,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:58:03,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:58:03,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:58:03,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:58:03,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:58:03,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:58:03,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:58:03,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:58:03,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:58:03,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:58:03,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:58:03,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:58:03,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:58:03,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:58:03,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:58:03,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:58:03,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:58:03,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:58:03,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:58:03,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:58:03,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:58:03,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:58:03,099 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:58:03,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:58:03,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:58:03,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:58:03,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:58:03,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:58:03,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:58:03,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:58:03,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:58:03,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:58:03,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:58:03,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:58:03,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:58:03,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:58:03,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:58:03,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:58:03,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:58:03,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:58:03,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:58:03,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:58:03,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:58:03,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:58:03,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:58:03,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:58:03,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:58:03,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:58:03,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 [2021-12-15 08:58:03,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:58:03,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:58:03,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:58:03,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:58:03,335 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:58:03,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-12-15 08:58:03,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ead2eab3/281d4d5695354187831e7e53292dc609/FLAG61fe5b718 [2021-12-15 08:58:03,866 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:58:03,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-12-15 08:58:03,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ead2eab3/281d4d5695354187831e7e53292dc609/FLAG61fe5b718 [2021-12-15 08:58:04,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ead2eab3/281d4d5695354187831e7e53292dc609 [2021-12-15 08:58:04,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:58:04,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:58:04,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:58:04,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:58:04,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:58:04,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:04,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b85e52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04, skipping insertion in model container [2021-12-15 08:58:04,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:04,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:58:04,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:58:04,775 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_clnt.blast.02.i.cil-1.c[65397,65410] [2021-12-15 08:58:04,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:58:04,801 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:58:04,946 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_clnt.blast.02.i.cil-1.c[65397,65410] [2021-12-15 08:58:04,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:58:04,961 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:58:04,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04 WrapperNode [2021-12-15 08:58:04,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:58:04,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:58:04,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:58:04,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:58:04,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,052 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-12-15 08:58:05,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:58:05,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:58:05,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:58:05,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:58:05,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:58:05,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:58:05,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:58:05,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:58:05,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (1/1) ... [2021-12-15 08:58:05,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:58:05,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:58:05,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:58:05,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:58:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:58:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 08:58:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:58:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:58:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 08:58:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:58:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:58:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:58:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:58:05,383 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:58:05,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:58:05,403 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 08:58:08,166 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-12-15 08:58:08,167 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-12-15 08:58:08,167 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:58:08,173 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:58:08,173 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:58:08,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:58:08 BoogieIcfgContainer [2021-12-15 08:58:08,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:58:08,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:58:08,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:58:08,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:58:08,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:58:04" (1/3) ... [2021-12-15 08:58:08,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34df8434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:58:08, skipping insertion in model container [2021-12-15 08:58:08,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:04" (2/3) ... [2021-12-15 08:58:08,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34df8434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:58:08, skipping insertion in model container [2021-12-15 08:58:08,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:58:08" (3/3) ... [2021-12-15 08:58:08,186 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-1.c [2021-12-15 08:58:08,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:58:08,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:58:08,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:58:08,264 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:58:08,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:58:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 08:58:08,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:08,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:08,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-12-15 08:58:08,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401959657] [2021-12-15 08:58:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:08,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:08,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401959657] [2021-12-15 08:58:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401959657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:08,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:08,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:08,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719390568] [2021-12-15 08:58:08,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:08,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:08,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:08,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:08,987 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 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 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:10,404 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 [] [2021-12-15 08:58:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:10,857 INFO L93 Difference]: Finished difference Result 360 states and 608 transitions. [2021-12-15 08:58:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-15 08:58:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:10,869 INFO L225 Difference]: With dead ends: 360 [2021-12-15 08:58:10,869 INFO L226 Difference]: Without dead ends: 205 [2021-12-15 08:58:10,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:10,874 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 143 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:10,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 378 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 08:58:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-15 08:58:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-12-15 08:58:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5629629629629629) internal successors, (211), 135 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 211 transitions. [2021-12-15 08:58:10,914 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 211 transitions. Word has length 24 [2021-12-15 08:58:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:10,914 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 211 transitions. [2021-12-15 08:58:10,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 211 transitions. [2021-12-15 08:58:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:58:10,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:10,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:10,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:58:10,916 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2051408280, now seen corresponding path program 1 times [2021-12-15 08:58:10,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:10,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419814567] [2021-12-15 08:58:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:10,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:11,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419814567] [2021-12-15 08:58:11,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419814567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:11,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:11,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:11,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941456795] [2021-12-15 08:58:11,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:11,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:11,085 INFO L87 Difference]: Start difference. First operand 136 states and 211 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:13,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:13,259 INFO L93 Difference]: Finished difference Result 269 states and 416 transitions. [2021-12-15 08:58:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 08:58:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:13,262 INFO L225 Difference]: With dead ends: 269 [2021-12-15 08:58:13,263 INFO L226 Difference]: Without dead ends: 140 [2021-12-15 08:58:13,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:13,264 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 7 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:13,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-15 08:58:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-12-15 08:58:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2021-12-15 08:58:13,280 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 25 [2021-12-15 08:58:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:13,281 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2021-12-15 08:58:13,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2021-12-15 08:58:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:58:13,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:13,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:13,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:58:13,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 992174912, now seen corresponding path program 1 times [2021-12-15 08:58:13,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:13,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031838322] [2021-12-15 08:58:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:13,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:58:13,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:13,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031838322] [2021-12-15 08:58:13,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031838322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:13,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:13,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:58:13,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834366937] [2021-12-15 08:58:13,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:13,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:58:13,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:58:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:58:13,506 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:13,538 INFO L93 Difference]: Finished difference Result 392 states and 608 transitions. [2021-12-15 08:58:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:58:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 08:58:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:13,541 INFO L225 Difference]: With dead ends: 392 [2021-12-15 08:58:13,541 INFO L226 Difference]: Without dead ends: 263 [2021-12-15 08:58:13,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:58:13,543 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 122 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:13,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 311 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:58:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-15 08:58:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-15 08:58:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.5381679389312977) internal successors, (403), 262 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 403 transitions. [2021-12-15 08:58:13,561 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 403 transitions. Word has length 39 [2021-12-15 08:58:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:13,562 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 403 transitions. [2021-12-15 08:58:13,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 403 transitions. [2021-12-15 08:58:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 08:58:13,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:13,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:13,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:58:13,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash 834080616, now seen corresponding path program 1 times [2021-12-15 08:58:13,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:13,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374326806] [2021-12-15 08:58:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:13,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:58:13,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:13,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374326806] [2021-12-15 08:58:13,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374326806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:13,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:13,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:58:13,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495329694] [2021-12-15 08:58:13,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:13,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:58:13,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:58:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:58:13,810 INFO L87 Difference]: Start difference. First operand 263 states and 403 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:15,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:15,866 INFO L93 Difference]: Finished difference Result 516 states and 798 transitions. [2021-12-15 08:58:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:58:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 54 [2021-12-15 08:58:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:15,869 INFO L225 Difference]: With dead ends: 516 [2021-12-15 08:58:15,869 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 08:58:15,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:58:15,870 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 123 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:15,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 460 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 08:58:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 08:58:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-12-15 08:58:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5336787564766838) internal successors, (592), 386 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 592 transitions. [2021-12-15 08:58:15,885 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 592 transitions. Word has length 54 [2021-12-15 08:58:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:15,886 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 592 transitions. [2021-12-15 08:58:15,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 592 transitions. [2021-12-15 08:58:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 08:58:15,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:15,889 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 08:58:15,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:58:15,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash -114315255, now seen corresponding path program 1 times [2021-12-15 08:58:15,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:15,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088590154] [2021-12-15 08:58:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:15,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:16,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088590154] [2021-12-15 08:58:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088590154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:16,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409511097] [2021-12-15 08:58:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:16,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:16,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:16,142 INFO L87 Difference]: Start difference. First operand 387 states and 592 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:18,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:20,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:20,501 INFO L93 Difference]: Finished difference Result 941 states and 1438 transitions. [2021-12-15 08:58:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:20,502 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 72 [2021-12-15 08:58:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:20,505 INFO L225 Difference]: With dead ends: 941 [2021-12-15 08:58:20,505 INFO L226 Difference]: Without dead ends: 564 [2021-12-15 08:58:20,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:20,506 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 91 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:20,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-15 08:58:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 439. [2021-12-15 08:58:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2021-12-15 08:58:20,524 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 72 [2021-12-15 08:58:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:20,526 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2021-12-15 08:58:20,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2021-12-15 08:58:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 08:58:20,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:20,533 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 08:58:20,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:58:20,533 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:20,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash 26233355, now seen corresponding path program 1 times [2021-12-15 08:58:20,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:20,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465802960] [2021-12-15 08:58:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:20,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:20,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465802960] [2021-12-15 08:58:20,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465802960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:20,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:20,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:20,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439823055] [2021-12-15 08:58:20,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:20,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:20,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:20,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:20,743 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:22,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:23,069 INFO L93 Difference]: Finished difference Result 1139 states and 1753 transitions. [2021-12-15 08:58:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:23,070 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 72 [2021-12-15 08:58:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:23,073 INFO L225 Difference]: With dead ends: 1139 [2021-12-15 08:58:23,073 INFO L226 Difference]: Without dead ends: 710 [2021-12-15 08:58:23,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:23,076 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:23,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-15 08:58:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 462. [2021-12-15 08:58:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.5704989154013016) internal successors, (724), 461 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) [2021-12-15 08:58:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2021-12-15 08:58:23,106 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 72 [2021-12-15 08:58:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:23,106 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2021-12-15 08:58:23,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2021-12-15 08:58:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 08:58:23,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:23,109 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:23,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 08:58:23,109 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1848863885, now seen corresponding path program 1 times [2021-12-15 08:58:23,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:23,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565659172] [2021-12-15 08:58:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:23,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:23,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565659172] [2021-12-15 08:58:23,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565659172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:23,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:23,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:23,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062417811] [2021-12-15 08:58:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:23,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:23,368 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:25,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:27,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:27,723 INFO L93 Difference]: Finished difference Result 1091 states and 1700 transitions. [2021-12-15 08:58:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:27,724 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 92 [2021-12-15 08:58:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:27,726 INFO L225 Difference]: With dead ends: 1091 [2021-12-15 08:58:27,726 INFO L226 Difference]: Without dead ends: 639 [2021-12-15 08:58:27,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:27,728 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 93 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:27,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-15 08:58:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 508. [2021-12-15 08:58:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.581854043392505) internal successors, (802), 507 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 802 transitions. [2021-12-15 08:58:27,740 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 802 transitions. Word has length 92 [2021-12-15 08:58:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:27,740 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 802 transitions. [2021-12-15 08:58:27,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 802 transitions. [2021-12-15 08:58:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 08:58:27,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:27,742 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 08:58:27,743 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1552617073, now seen corresponding path program 1 times [2021-12-15 08:58:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:27,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135432896] [2021-12-15 08:58:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:27,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 08:58:27,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:27,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135432896] [2021-12-15 08:58:27,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135432896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:27,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:27,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:27,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971246012] [2021-12-15 08:58:27,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:27,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:27,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:27,936 INFO L87 Difference]: Start difference. First operand 508 states and 802 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:29,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:31,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:32,188 INFO L93 Difference]: Finished difference Result 1091 states and 1717 transitions. [2021-12-15 08:58:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-15 08:58:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:32,191 INFO L225 Difference]: With dead ends: 1091 [2021-12-15 08:58:32,192 INFO L226 Difference]: Without dead ends: 593 [2021-12-15 08:58:32,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:32,193 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 40 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:32,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 494 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 08:58:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-15 08:58:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 548. [2021-12-15 08:58:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5904936014625228) internal successors, (870), 547 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 870 transitions. [2021-12-15 08:58:32,205 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 870 transitions. Word has length 92 [2021-12-15 08:58:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:32,205 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 870 transitions. [2021-12-15 08:58:32,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 870 transitions. [2021-12-15 08:58:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 08:58:32,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:32,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:32,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:58:32,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:32,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1859686006, now seen corresponding path program 1 times [2021-12-15 08:58:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375765713] [2021-12-15 08:58:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:32,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:32,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375765713] [2021-12-15 08:58:32,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375765713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:32,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:32,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:32,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624374681] [2021-12-15 08:58:32,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:32,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:32,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:32,424 INFO L87 Difference]: Start difference. First operand 548 states and 870 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:34,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:36,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:36,770 INFO L93 Difference]: Finished difference Result 1211 states and 1905 transitions. [2021-12-15 08:58:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:36,770 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 93 [2021-12-15 08:58:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:36,773 INFO L225 Difference]: With dead ends: 1211 [2021-12-15 08:58:36,773 INFO L226 Difference]: Without dead ends: 673 [2021-12-15 08:58:36,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:36,774 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 88 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:36,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 542 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-12-15 08:58:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 550. [2021-12-15 08:58:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5883424408014573) internal successors, (872), 549 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 872 transitions. [2021-12-15 08:58:36,786 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 872 transitions. Word has length 93 [2021-12-15 08:58:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:36,786 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 872 transitions. [2021-12-15 08:58:36,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 872 transitions. [2021-12-15 08:58:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:58:36,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:36,788 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:36,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 08:58:36,788 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:36,789 INFO L85 PathProgramCache]: Analyzing trace with hash 500641909, now seen corresponding path program 2 times [2021-12-15 08:58:36,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:36,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074437471] [2021-12-15 08:58:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:36,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:37,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:37,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074437471] [2021-12-15 08:58:37,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074437471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:37,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:37,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:37,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362262922] [2021-12-15 08:58:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:37,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:37,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:37,003 INFO L87 Difference]: Start difference. First operand 550 states and 872 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:39,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:41,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:41,301 INFO L93 Difference]: Finished difference Result 1283 states and 1999 transitions. [2021-12-15 08:58:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:58:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:41,305 INFO L225 Difference]: With dead ends: 1283 [2021-12-15 08:58:41,305 INFO L226 Difference]: Without dead ends: 743 [2021-12-15 08:58:41,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:41,306 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 112 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:41,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 282 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-12-15 08:58:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 550. [2021-12-15 08:58:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.570127504553734) internal successors, (862), 549 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 862 transitions. [2021-12-15 08:58:41,320 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 862 transitions. Word has length 106 [2021-12-15 08:58:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:41,320 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 862 transitions. [2021-12-15 08:58:41,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 862 transitions. [2021-12-15 08:58:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:58:41,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:41,322 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:41,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 08:58:41,323 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1117113491, now seen corresponding path program 1 times [2021-12-15 08:58:41,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:41,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239250717] [2021-12-15 08:58:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:41,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:41,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239250717] [2021-12-15 08:58:41,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239250717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:41,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:41,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:41,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548275722] [2021-12-15 08:58:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:41,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:41,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:41,496 INFO L87 Difference]: Start difference. First operand 550 states and 862 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:43,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:45,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:45,820 INFO L93 Difference]: Finished difference Result 1211 states and 1883 transitions. [2021-12-15 08:58:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:45,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:58:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:45,823 INFO L225 Difference]: With dead ends: 1211 [2021-12-15 08:58:45,823 INFO L226 Difference]: Without dead ends: 671 [2021-12-15 08:58:45,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:45,824 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 97 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:45,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 538 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-15 08:58:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 550. [2021-12-15 08:58:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5664845173041895) internal successors, (860), 549 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 860 transitions. [2021-12-15 08:58:45,836 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 860 transitions. Word has length 106 [2021-12-15 08:58:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:45,837 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 860 transitions. [2021-12-15 08:58:45,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 860 transitions. [2021-12-15 08:58:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:58:45,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:45,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:45,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 08:58:45,839 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1677813269, now seen corresponding path program 1 times [2021-12-15 08:58:45,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547530501] [2021-12-15 08:58:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:45,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:46,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:46,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547530501] [2021-12-15 08:58:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547530501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:46,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:46,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:46,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672583037] [2021-12-15 08:58:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:46,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:46,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:46,021 INFO L87 Difference]: Start difference. First operand 550 states and 860 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:48,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:48,316 INFO L93 Difference]: Finished difference Result 1284 states and 1976 transitions. [2021-12-15 08:58:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:58:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:48,319 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 08:58:48,319 INFO L226 Difference]: Without dead ends: 744 [2021-12-15 08:58:48,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:48,320 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 119 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:48,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-15 08:58:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 550. [2021-12-15 08:58:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5519125683060109) internal successors, (852), 549 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 852 transitions. [2021-12-15 08:58:48,333 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 852 transitions. Word has length 106 [2021-12-15 08:58:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:48,333 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 852 transitions. [2021-12-15 08:58:48,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 852 transitions. [2021-12-15 08:58:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 08:58:48,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:48,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:48,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 08:58:48,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash -602992740, now seen corresponding path program 1 times [2021-12-15 08:58:48,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:48,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012401261] [2021-12-15 08:58:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:48,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:48,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012401261] [2021-12-15 08:58:48,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012401261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:48,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:48,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:48,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356041169] [2021-12-15 08:58:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:48,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:48,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:48,505 INFO L87 Difference]: Start difference. First operand 550 states and 852 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:50,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:50,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:50,791 INFO L93 Difference]: Finished difference Result 1284 states and 1960 transitions. [2021-12-15 08:58:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:50,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 08:58:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:50,795 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 08:58:50,795 INFO L226 Difference]: Without dead ends: 744 [2021-12-15 08:58:50,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:50,796 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:50,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 290 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-15 08:58:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 550. [2021-12-15 08:58:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5336976320582878) internal successors, (842), 549 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 842 transitions. [2021-12-15 08:58:50,808 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 842 transitions. Word has length 107 [2021-12-15 08:58:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:50,809 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 842 transitions. [2021-12-15 08:58:50,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 842 transitions. [2021-12-15 08:58:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 08:58:50,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:50,811 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:50,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 08:58:50,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1332849040, now seen corresponding path program 1 times [2021-12-15 08:58:50,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653647487] [2021-12-15 08:58:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:50,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:50,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653647487] [2021-12-15 08:58:50,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653647487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:50,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:50,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:50,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153787704] [2021-12-15 08:58:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:50,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:50,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:50,990 INFO L87 Difference]: Start difference. First operand 550 states and 842 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:52,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:53,259 INFO L93 Difference]: Finished difference Result 1365 states and 2066 transitions. [2021-12-15 08:58:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:53,260 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 107 [2021-12-15 08:58:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:53,262 INFO L225 Difference]: With dead ends: 1365 [2021-12-15 08:58:53,262 INFO L226 Difference]: Without dead ends: 825 [2021-12-15 08:58:53,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:53,264 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:53,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 266 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-15 08:58:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 664. [2021-12-15 08:58:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.555052790346908) internal successors, (1031), 663 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1031 transitions. [2021-12-15 08:58:53,278 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1031 transitions. Word has length 107 [2021-12-15 08:58:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:53,279 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1031 transitions. [2021-12-15 08:58:53,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1031 transitions. [2021-12-15 08:58:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:58:53,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:53,281 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:53,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 08:58:53,281 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1015692680, now seen corresponding path program 1 times [2021-12-15 08:58:53,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:53,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764105040] [2021-12-15 08:58:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:53,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:53,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:53,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764105040] [2021-12-15 08:58:53,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764105040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:53,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:53,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:53,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50215315] [2021-12-15 08:58:53,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:53,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:53,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:53,443 INFO L87 Difference]: Start difference. First operand 664 states and 1031 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:55,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:57,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:57,767 INFO L93 Difference]: Finished difference Result 1439 states and 2219 transitions. [2021-12-15 08:58:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:57,767 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 108 [2021-12-15 08:58:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:57,770 INFO L225 Difference]: With dead ends: 1439 [2021-12-15 08:58:57,770 INFO L226 Difference]: Without dead ends: 785 [2021-12-15 08:58:57,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:58:57,773 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 92 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:57,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 532 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-12-15 08:58:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 664. [2021-12-15 08:58:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.5520361990950227) internal successors, (1029), 663 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1029 transitions. [2021-12-15 08:58:57,806 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1029 transitions. Word has length 108 [2021-12-15 08:58:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:57,807 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1029 transitions. [2021-12-15 08:58:57,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1029 transitions. [2021-12-15 08:58:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:58:57,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:57,809 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:57,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 08:58:57,809 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -805941339, now seen corresponding path program 1 times [2021-12-15 08:58:57,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177294316] [2021-12-15 08:58:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:57,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:57,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:57,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177294316] [2021-12-15 08:58:57,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177294316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:57,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:57,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:57,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822526147] [2021-12-15 08:58:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:57,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:57,996 INFO L87 Difference]: Start difference. First operand 664 states and 1029 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:00,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:00,334 INFO L93 Difference]: Finished difference Result 1391 states and 2142 transitions. [2021-12-15 08:59:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:00,334 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 108 [2021-12-15 08:59:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:00,337 INFO L225 Difference]: With dead ends: 1391 [2021-12-15 08:59:00,338 INFO L226 Difference]: Without dead ends: 966 [2021-12-15 08:59:00,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:00,339 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 113 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:00,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 488 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-15 08:59:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 712. [2021-12-15 08:59:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.530239099859353) internal successors, (1088), 711 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1088 transitions. [2021-12-15 08:59:00,363 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1088 transitions. Word has length 108 [2021-12-15 08:59:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:00,364 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1088 transitions. [2021-12-15 08:59:00,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1088 transitions. [2021-12-15 08:59:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:00,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:00,366 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:00,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 08:59:00,366 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -82572025, now seen corresponding path program 1 times [2021-12-15 08:59:00,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429590715] [2021-12-15 08:59:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:00,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:59:00,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429590715] [2021-12-15 08:59:00,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429590715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:00,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:00,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:00,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926022745] [2021-12-15 08:59:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:00,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:00,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:00,537 INFO L87 Difference]: Start difference. First operand 712 states and 1088 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) [2021-12-15 08:59:02,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:04,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:04,839 INFO L93 Difference]: Finished difference Result 1531 states and 2329 transitions. [2021-12-15 08:59:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:04,839 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 108 [2021-12-15 08:59:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:04,842 INFO L225 Difference]: With dead ends: 1531 [2021-12-15 08:59:04,842 INFO L226 Difference]: Without dead ends: 829 [2021-12-15 08:59:04,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:04,845 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 66 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:04,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 526 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:59:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-15 08:59:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 740. [2021-12-15 08:59:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.537212449255751) internal successors, (1136), 739 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1136 transitions. [2021-12-15 08:59:04,870 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1136 transitions. Word has length 108 [2021-12-15 08:59:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:04,871 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1136 transitions. [2021-12-15 08:59:04,871 INFO L471 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) [2021-12-15 08:59:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1136 transitions. [2021-12-15 08:59:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:04,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:04,873 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:04,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 08:59:04,873 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash 803875412, now seen corresponding path program 1 times [2021-12-15 08:59:04,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461786911] [2021-12-15 08:59:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:04,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:59:05,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461786911] [2021-12-15 08:59:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461786911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:05,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:05,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:05,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758791022] [2021-12-15 08:59:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:05,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:05,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:05,062 INFO L87 Difference]: Start difference. First operand 740 states and 1136 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) [2021-12-15 08:59:07,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:07,329 INFO L93 Difference]: Finished difference Result 1664 states and 2528 transitions. [2021-12-15 08:59:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:07,329 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 108 [2021-12-15 08:59:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:07,332 INFO L225 Difference]: With dead ends: 1664 [2021-12-15 08:59:07,332 INFO L226 Difference]: Without dead ends: 934 [2021-12-15 08:59:07,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:07,333 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 91 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:07,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-12-15 08:59:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 779. [2021-12-15 08:59:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 1.556555269922879) internal successors, (1211), 778 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1211 transitions. [2021-12-15 08:59:07,351 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1211 transitions. Word has length 108 [2021-12-15 08:59:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:07,351 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1211 transitions. [2021-12-15 08:59:07,351 INFO L471 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) [2021-12-15 08:59:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1211 transitions. [2021-12-15 08:59:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:07,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:07,353 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:07,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 08:59:07,354 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash 945881978, now seen corresponding path program 1 times [2021-12-15 08:59:07,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:07,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976007143] [2021-12-15 08:59:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:07,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:59:07,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:07,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976007143] [2021-12-15 08:59:07,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976007143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:07,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:07,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:07,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844687401] [2021-12-15 08:59:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:07,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:07,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:07,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:07,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:07,515 INFO L87 Difference]: Start difference. First operand 779 states and 1211 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:09,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:09,761 INFO L93 Difference]: Finished difference Result 1703 states and 2600 transitions. [2021-12-15 08:59:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:09,762 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 108 [2021-12-15 08:59:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:09,764 INFO L225 Difference]: With dead ends: 1703 [2021-12-15 08:59:09,764 INFO L226 Difference]: Without dead ends: 934 [2021-12-15 08:59:09,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:09,765 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 114 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:09,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-12-15 08:59:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 779. [2021-12-15 08:59:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 1.538560411311054) internal successors, (1197), 778 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1197 transitions. [2021-12-15 08:59:09,790 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1197 transitions. Word has length 108 [2021-12-15 08:59:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:09,790 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1197 transitions. [2021-12-15 08:59:09,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1197 transitions. [2021-12-15 08:59:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 08:59:09,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:09,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:09,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 08:59:09,793 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash 446496737, now seen corresponding path program 1 times [2021-12-15 08:59:09,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:09,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866124840] [2021-12-15 08:59:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:09,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:59:09,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:09,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866124840] [2021-12-15 08:59:09,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866124840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:09,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:09,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:09,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13765373] [2021-12-15 08:59:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:09,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:09,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:09,970 INFO L87 Difference]: Start difference. First operand 779 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:11,978 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 []