./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.10.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 b9a657fa9aacca0974ed9e42f1311e36e1c5af368a54222ebad4a487f8951064 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:11:53,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:11:53,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:11:53,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:11:53,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:11:53,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:11:53,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:11:53,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:11:53,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:11:53,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:11:53,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:11:53,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:11:53,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:11:53,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:11:53,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:11:53,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:11:53,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:11:53,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:11:53,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:11:53,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:11:53,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:11:53,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:11:53,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:11:53,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:11:53,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:11:53,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:11:53,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:11:53,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:11:53,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:11:53,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:11:53,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:11:53,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:11:53,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:11:53,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:11:53,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:11:53,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:11:53,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:11:53,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:11:53,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:11:53,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:11:53,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:11:53,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:11:53,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:11:53,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:11:53,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:11:53,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:11:53,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:11:53,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:11:53,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:11:53,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:11:53,321 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:11:53,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:11:53,322 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:11:53,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:11:53,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:11:53,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:11:53,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:11:53,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:11:53,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:11:53,323 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:11:53,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:11:53,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:11:53,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:11:53,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:11:53,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:11:53,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:11:53,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:11:53,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:11:53,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:11:53,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:11:53,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:11:53,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:11:53,326 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:11:53,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:11:53,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:11:53,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:11:53,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9a657fa9aacca0974ed9e42f1311e36e1c5af368a54222ebad4a487f8951064 [2021-12-17 03:11:53,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:11:53,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:11:53,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:11:53,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:11:53,562 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:11:53,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c [2021-12-17 03:11:53,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c333063c9/a90a3b66939c432aba1d12abb9332b35/FLAG449928e46 [2021-12-17 03:11:54,038 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:11:54,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c [2021-12-17 03:11:54,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c333063c9/a90a3b66939c432aba1d12abb9332b35/FLAG449928e46 [2021-12-17 03:11:54,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c333063c9/a90a3b66939c432aba1d12abb9332b35 [2021-12-17 03:11:54,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:11:54,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:11:54,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:11:54,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:11:54,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:11:54,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b2c86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54, skipping insertion in model container [2021-12-17 03:11:54,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:11:54,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:11:54,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c[73581,73594] [2021-12-17 03:11:54,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:11:54,735 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:11:54,807 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c[73581,73594] [2021-12-17 03:11:54,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:11:54,833 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:11:54,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54 WrapperNode [2021-12-17 03:11:54,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:11:54,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:11:54,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:11:54,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:11:54,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,904 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 788 [2021-12-17 03:11:54,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:11:54,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:11:54,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:11:54,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:11:54,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:54,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:11:54,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:11:54,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:11:54,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:11:54,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (1/1) ... [2021-12-17 03:11:55,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:11:55,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:11:55,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:11:55,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:11:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:11:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:11:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:11:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:11:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:11:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:11:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:11:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:11:55,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:11:55,244 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:11:55,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:11:55,263 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:11:57,445 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:11:57,445 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:11:57,445 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:11:57,450 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:11:57,450 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:11:57,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:11:57 BoogieIcfgContainer [2021-12-17 03:11:57,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:11:57,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:11:57,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:11:57,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:11:57,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:11:54" (1/3) ... [2021-12-17 03:11:57,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3adda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:11:57, skipping insertion in model container [2021-12-17 03:11:57,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:11:54" (2/3) ... [2021-12-17 03:11:57,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3adda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:11:57, skipping insertion in model container [2021-12-17 03:11:57,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:11:57" (3/3) ... [2021-12-17 03:11:57,457 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-1.c [2021-12-17 03:11:57,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:11:57,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:11:57,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:11:57,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:11:57,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:11:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.7123287671232876) internal successors, (250), 147 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 03:11:57,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:11:57,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:11:57,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:11:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:11:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash 917223054, now seen corresponding path program 1 times [2021-12-17 03:11:57,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:11:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23277754] [2021-12-17 03:11:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:11:57,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:11:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:11:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:11:57,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:11:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23277754] [2021-12-17 03:11:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23277754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:11:57,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:11:57,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:11:57,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578022877] [2021-12-17 03:11:57,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:11:57,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:11:57,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:11:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:11:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:11:57,898 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.7123287671232876) internal successors, (250), 147 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:11:58,538 INFO L93 Difference]: Finished difference Result 321 states and 542 transitions. [2021-12-17 03:11:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:11:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-17 03:11:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:11:58,548 INFO L225 Difference]: With dead ends: 321 [2021-12-17 03:11:58,549 INFO L226 Difference]: Without dead ends: 163 [2021-12-17 03:11:58,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:11:58,554 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 36 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:11:58,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 573 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:11:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-17 03:11:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 146. [2021-12-17 03:11:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 145 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 225 transitions. [2021-12-17 03:11:58,583 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 225 transitions. Word has length 44 [2021-12-17 03:11:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:11:58,583 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 225 transitions. [2021-12-17 03:11:58,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 225 transitions. [2021-12-17 03:11:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:11:58,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:11:58,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:11:58,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:11:58,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:11:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:11:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1158376879, now seen corresponding path program 1 times [2021-12-17 03:11:58,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:11:58,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870596157] [2021-12-17 03:11:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:11:58,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:11:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:11:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:11:58,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:11:58,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870596157] [2021-12-17 03:11:58,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870596157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:11:58,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:11:58,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:11:58,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850962157] [2021-12-17 03:11:58,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:11:58,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:11:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:11:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:11:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:11:58,710 INFO L87 Difference]: Start difference. First operand 146 states and 225 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:11:59,272 INFO L93 Difference]: Finished difference Result 288 states and 438 transitions. [2021-12-17 03:11:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:11:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-17 03:11:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:11:59,274 INFO L225 Difference]: With dead ends: 288 [2021-12-17 03:11:59,274 INFO L226 Difference]: Without dead ends: 163 [2021-12-17 03:11:59,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:11:59,276 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 24 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:11:59,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 459 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:11:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-17 03:11:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 146. [2021-12-17 03:11:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.5448275862068965) internal successors, (224), 145 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 224 transitions. [2021-12-17 03:11:59,284 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 224 transitions. Word has length 57 [2021-12-17 03:11:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:11:59,284 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 224 transitions. [2021-12-17 03:11:59,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 224 transitions. [2021-12-17 03:11:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 03:11:59,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:11:59,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:11:59,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:11:59,286 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:11:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:11:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 932448638, now seen corresponding path program 1 times [2021-12-17 03:11:59,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:11:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942023104] [2021-12-17 03:11:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:11:59,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:11:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:11:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:11:59,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:11:59,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942023104] [2021-12-17 03:11:59,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942023104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:11:59,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:11:59,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:11:59,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608928437] [2021-12-17 03:11:59,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:11:59,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:11:59,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:11:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:11:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:11:59,400 INFO L87 Difference]: Start difference. First operand 146 states and 224 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:11:59,931 INFO L93 Difference]: Finished difference Result 386 states and 595 transitions. [2021-12-17 03:11:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:11:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 03:11:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:11:59,933 INFO L225 Difference]: With dead ends: 386 [2021-12-17 03:11:59,933 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 03:11:59,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:11:59,934 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 146 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:11:59,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 320 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:11:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 03:11:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 157. [2021-12-17 03:11:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5320512820512822) internal successors, (239), 156 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 239 transitions. [2021-12-17 03:11:59,942 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 239 transitions. Word has length 58 [2021-12-17 03:11:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:11:59,942 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 239 transitions. [2021-12-17 03:11:59,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:11:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 239 transitions. [2021-12-17 03:11:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 03:11:59,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:11:59,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:11:59,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:11:59,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:11:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:11:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -115062166, now seen corresponding path program 1 times [2021-12-17 03:11:59,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:11:59,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726445340] [2021-12-17 03:11:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:11:59,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:11:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:00,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726445340] [2021-12-17 03:12:00,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726445340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:00,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:00,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:00,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604380203] [2021-12-17 03:12:00,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:00,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:00,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:00,027 INFO L87 Difference]: Start difference. First operand 157 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:01,260 INFO L93 Difference]: Finished difference Result 397 states and 609 transitions. [2021-12-17 03:12:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 03:12:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:01,262 INFO L225 Difference]: With dead ends: 397 [2021-12-17 03:12:01,262 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 03:12:01,263 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 [2021-12-17 03:12:01,265 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 144 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:01,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 320 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:12:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 03:12:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 158. [2021-12-17 03:12:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.5222929936305734) internal successors, (239), 157 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 239 transitions. [2021-12-17 03:12:01,292 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 239 transitions. Word has length 58 [2021-12-17 03:12:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:01,294 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 239 transitions. [2021-12-17 03:12:01,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 239 transitions. [2021-12-17 03:12:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 03:12:01,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:01,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:01,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:12:01,300 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1250928461, now seen corresponding path program 1 times [2021-12-17 03:12:01,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790441061] [2021-12-17 03:12:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:01,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:01,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790441061] [2021-12-17 03:12:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790441061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:01,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393432864] [2021-12-17 03:12:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:01,378 INFO L87 Difference]: Start difference. First operand 158 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:02,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:03,088 INFO L93 Difference]: Finished difference Result 397 states and 607 transitions. [2021-12-17 03:12:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 03:12:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:03,090 INFO L225 Difference]: With dead ends: 397 [2021-12-17 03:12:03,090 INFO L226 Difference]: Without dead ends: 260 [2021-12-17 03:12:03,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:03,091 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 137 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:03,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:12:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-17 03:12:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 164. [2021-12-17 03:12:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5276073619631902) internal successors, (249), 163 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 249 transitions. [2021-12-17 03:12:03,097 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 249 transitions. Word has length 58 [2021-12-17 03:12:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:03,097 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 249 transitions. [2021-12-17 03:12:03,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 249 transitions. [2021-12-17 03:12:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 03:12:03,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:03,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:03,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:12:03,098 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 69924851, now seen corresponding path program 1 times [2021-12-17 03:12:03,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:03,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106822346] [2021-12-17 03:12:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:03,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:03,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:03,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106822346] [2021-12-17 03:12:03,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106822346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:03,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:03,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:03,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404118925] [2021-12-17 03:12:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:03,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:03,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:03,183 INFO L87 Difference]: Start difference. First operand 164 states and 249 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:04,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:05,167 INFO L93 Difference]: Finished difference Result 320 states and 486 transitions. [2021-12-17 03:12:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 03:12:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:05,169 INFO L225 Difference]: With dead ends: 320 [2021-12-17 03:12:05,169 INFO L226 Difference]: Without dead ends: 177 [2021-12-17 03:12:05,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:05,170 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 19 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:05,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 467 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 03:12:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-17 03:12:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-12-17 03:12:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.521472392638037) internal successors, (248), 163 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 248 transitions. [2021-12-17 03:12:05,179 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 248 transitions. Word has length 58 [2021-12-17 03:12:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:05,180 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 248 transitions. [2021-12-17 03:12:05,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2021-12-17 03:12:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:12:05,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:05,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:05,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:12:05,182 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:05,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1426916890, now seen corresponding path program 1 times [2021-12-17 03:12:05,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:05,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668942234] [2021-12-17 03:12:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:05,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:05,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668942234] [2021-12-17 03:12:05,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668942234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:05,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:05,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:05,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102467357] [2021-12-17 03:12:05,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:05,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:05,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:05,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:05,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:05,285 INFO L87 Difference]: Start difference. First operand 164 states and 248 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:07,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:07,641 INFO L93 Difference]: Finished difference Result 403 states and 615 transitions. [2021-12-17 03:12:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 03:12:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:07,643 INFO L225 Difference]: With dead ends: 403 [2021-12-17 03:12:07,643 INFO L226 Difference]: Without dead ends: 260 [2021-12-17 03:12:07,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:07,644 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 141 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:07,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:12:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-17 03:12:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 164. [2021-12-17 03:12:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.50920245398773) internal successors, (246), 163 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 246 transitions. [2021-12-17 03:12:07,648 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 246 transitions. Word has length 59 [2021-12-17 03:12:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:07,648 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 246 transitions. [2021-12-17 03:12:07,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 246 transitions. [2021-12-17 03:12:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:12:07,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:07,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:07,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:12:07,649 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash -766509563, now seen corresponding path program 1 times [2021-12-17 03:12:07,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:07,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334746936] [2021-12-17 03:12:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:07,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:07,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334746936] [2021-12-17 03:12:07,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334746936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:07,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:07,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:07,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64380282] [2021-12-17 03:12:07,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:07,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:07,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:07,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:07,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:07,720 INFO L87 Difference]: Start difference. First operand 164 states and 246 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:09,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:09,895 INFO L93 Difference]: Finished difference Result 320 states and 482 transitions. [2021-12-17 03:12:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:09,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-17 03:12:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:09,896 INFO L225 Difference]: With dead ends: 320 [2021-12-17 03:12:09,896 INFO L226 Difference]: Without dead ends: 177 [2021-12-17 03:12:09,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:09,897 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 20 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:09,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 467 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-17 03:12:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-12-17 03:12:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5030674846625767) internal successors, (245), 163 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 245 transitions. [2021-12-17 03:12:09,901 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 245 transitions. Word has length 60 [2021-12-17 03:12:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:09,901 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 245 transitions. [2021-12-17 03:12:09,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 245 transitions. [2021-12-17 03:12:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:12:09,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:09,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:09,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:12:09,902 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:09,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash 904479201, now seen corresponding path program 1 times [2021-12-17 03:12:09,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143312091] [2021-12-17 03:12:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:09,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:10,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143312091] [2021-12-17 03:12:10,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143312091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:10,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:10,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:10,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917362201] [2021-12-17 03:12:10,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:10,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:10,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:10,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:10,015 INFO L87 Difference]: Start difference. First operand 164 states and 245 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:11,413 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 [] [2021-12-17 03:12:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:11,673 INFO L93 Difference]: Finished difference Result 403 states and 611 transitions. [2021-12-17 03:12:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 03:12:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:11,674 INFO L225 Difference]: With dead ends: 403 [2021-12-17 03:12:11,674 INFO L226 Difference]: Without dead ends: 260 [2021-12-17 03:12:11,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:11,675 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 138 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:11,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 322 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 03:12:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-17 03:12:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 164. [2021-12-17 03:12:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.49079754601227) internal successors, (243), 163 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 243 transitions. [2021-12-17 03:12:11,679 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 243 transitions. Word has length 61 [2021-12-17 03:12:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:11,679 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 243 transitions. [2021-12-17 03:12:11,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 243 transitions. [2021-12-17 03:12:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:12:11,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:11,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:11,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:12:11,680 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1577478009, now seen corresponding path program 1 times [2021-12-17 03:12:11,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216823281] [2021-12-17 03:12:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:11,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:11,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216823281] [2021-12-17 03:12:11,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216823281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:11,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:11,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:11,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212767835] [2021-12-17 03:12:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:11,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:11,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:11,749 INFO L87 Difference]: Start difference. First operand 164 states and 243 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:13,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:14,065 INFO L93 Difference]: Finished difference Result 422 states and 635 transitions. [2021-12-17 03:12:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 03:12:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:14,067 INFO L225 Difference]: With dead ends: 422 [2021-12-17 03:12:14,067 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 03:12:14,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:14,068 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 114 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:14,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 324 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:12:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 03:12:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 204. [2021-12-17 03:12:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.5320197044334976) internal successors, (311), 203 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 311 transitions. [2021-12-17 03:12:14,075 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 311 transitions. Word has length 61 [2021-12-17 03:12:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:14,075 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 311 transitions. [2021-12-17 03:12:14,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 311 transitions. [2021-12-17 03:12:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:12:14,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:14,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:14,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:12:14,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1454771428, now seen corresponding path program 1 times [2021-12-17 03:12:14,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:14,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488855398] [2021-12-17 03:12:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:14,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:12:14,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:14,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488855398] [2021-12-17 03:12:14,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488855398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:14,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:14,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:14,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909860371] [2021-12-17 03:12:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:14,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:14,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:14,166 INFO L87 Difference]: Start difference. First operand 204 states and 311 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:15,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:15,962 INFO L93 Difference]: Finished difference Result 483 states and 744 transitions. [2021-12-17 03:12:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:12:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:15,964 INFO L225 Difference]: With dead ends: 483 [2021-12-17 03:12:15,964 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 03:12:15,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:15,965 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 113 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:15,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 342 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 03:12:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 03:12:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2021-12-17 03:12:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5733333333333333) internal successors, (354), 225 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 354 transitions. [2021-12-17 03:12:15,969 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 354 transitions. Word has length 62 [2021-12-17 03:12:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:15,970 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 354 transitions. [2021-12-17 03:12:15,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 354 transitions. [2021-12-17 03:12:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-17 03:12:15,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:15,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:15,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:12:15,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash 413039593, now seen corresponding path program 1 times [2021-12-17 03:12:15,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705945323] [2021-12-17 03:12:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:15,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:12:16,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705945323] [2021-12-17 03:12:16,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705945323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:16,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:16,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:16,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339694121] [2021-12-17 03:12:16,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:16,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:16,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:16,060 INFO L87 Difference]: Start difference. First operand 226 states and 354 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:18,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:18,290 INFO L93 Difference]: Finished difference Result 472 states and 742 transitions. [2021-12-17 03:12:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:18,291 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 90 [2021-12-17 03:12:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:18,292 INFO L225 Difference]: With dead ends: 472 [2021-12-17 03:12:18,292 INFO L226 Difference]: Without dead ends: 267 [2021-12-17 03:12:18,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:18,293 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 29 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:18,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 483 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-17 03:12:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 248. [2021-12-17 03:12:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5668016194331984) internal successors, (387), 247 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 387 transitions. [2021-12-17 03:12:18,297 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 387 transitions. Word has length 90 [2021-12-17 03:12:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:18,297 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 387 transitions. [2021-12-17 03:12:18,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 387 transitions. [2021-12-17 03:12:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 03:12:18,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:18,298 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:18,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:12:18,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash -499465058, now seen corresponding path program 1 times [2021-12-17 03:12:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172107435] [2021-12-17 03:12:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:18,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:12:18,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:18,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172107435] [2021-12-17 03:12:18,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172107435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:18,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:18,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:18,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007950413] [2021-12-17 03:12:18,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:18,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:18,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:18,391 INFO L87 Difference]: Start difference. First operand 248 states and 387 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:20,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:20,475 INFO L93 Difference]: Finished difference Result 589 states and 920 transitions. [2021-12-17 03:12:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:20,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-17 03:12:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:20,476 INFO L225 Difference]: With dead ends: 589 [2021-12-17 03:12:20,476 INFO L226 Difference]: Without dead ends: 362 [2021-12-17 03:12:20,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:20,477 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 136 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:20,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 342 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:12:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-17 03:12:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2021-12-17 03:12:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5475285171102662) internal successors, (407), 263 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 407 transitions. [2021-12-17 03:12:20,484 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 407 transitions. Word has length 103 [2021-12-17 03:12:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:20,484 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 407 transitions. [2021-12-17 03:12:20,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 407 transitions. [2021-12-17 03:12:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 03:12:20,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:20,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:20,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:12:20,485 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1012285468, now seen corresponding path program 1 times [2021-12-17 03:12:20,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:20,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680682830] [2021-12-17 03:12:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:20,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:12:20,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680682830] [2021-12-17 03:12:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680682830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:20,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:20,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:20,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649162032] [2021-12-17 03:12:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:20,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:20,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:20,591 INFO L87 Difference]: Start difference. First operand 264 states and 407 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) [2021-12-17 03:12:22,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:22,259 INFO L93 Difference]: Finished difference Result 524 states and 812 transitions. [2021-12-17 03:12:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:22,260 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 104 [2021-12-17 03:12:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:22,261 INFO L225 Difference]: With dead ends: 524 [2021-12-17 03:12:22,261 INFO L226 Difference]: Without dead ends: 281 [2021-12-17 03:12:22,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:22,262 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 32 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:22,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 487 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:12:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-17 03:12:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 264. [2021-12-17 03:12:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.543726235741445) internal successors, (406), 263 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 406 transitions. [2021-12-17 03:12:22,268 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 406 transitions. Word has length 104 [2021-12-17 03:12:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:22,268 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 406 transitions. [2021-12-17 03:12:22,269 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) [2021-12-17 03:12:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 406 transitions. [2021-12-17 03:12:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 03:12:22,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:22,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:22,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:12:22,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:22,270 INFO L85 PathProgramCache]: Analyzing trace with hash 351588818, now seen corresponding path program 1 times [2021-12-17 03:12:22,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:22,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721945367] [2021-12-17 03:12:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:22,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:12:22,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:22,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721945367] [2021-12-17 03:12:22,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721945367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:22,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:22,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:22,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719680580] [2021-12-17 03:12:22,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:22,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:22,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:22,342 INFO L87 Difference]: Start difference. First operand 264 states and 406 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:24,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:24,626 INFO L93 Difference]: Finished difference Result 571 states and 877 transitions. [2021-12-17 03:12:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-17 03:12:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:24,627 INFO L225 Difference]: With dead ends: 571 [2021-12-17 03:12:24,627 INFO L226 Difference]: Without dead ends: 328 [2021-12-17 03:12:24,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:24,628 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 131 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:24,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 358 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:12:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-17 03:12:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 264. [2021-12-17 03:12:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5285171102661597) internal successors, (402), 263 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 402 transitions. [2021-12-17 03:12:24,635 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 402 transitions. Word has length 106 [2021-12-17 03:12:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:24,636 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 402 transitions. [2021-12-17 03:12:24,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 402 transitions. [2021-12-17 03:12:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 03:12:24,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:24,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:24,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:12:24,637 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash -717206573, now seen corresponding path program 1 times [2021-12-17 03:12:24,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:24,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342752210] [2021-12-17 03:12:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:24,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:12:24,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342752210] [2021-12-17 03:12:24,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342752210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:24,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:24,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:24,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892217950] [2021-12-17 03:12:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:24,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:24,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:24,753 INFO L87 Difference]: Start difference. First operand 264 states and 402 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:26,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:27,023 INFO L93 Difference]: Finished difference Result 647 states and 997 transitions. [2021-12-17 03:12:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 03:12:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:27,025 INFO L225 Difference]: With dead ends: 647 [2021-12-17 03:12:27,025 INFO L226 Difference]: Without dead ends: 404 [2021-12-17 03:12:27,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:27,026 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 111 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:27,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 350 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:12:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-17 03:12:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 328. [2021-12-17 03:12:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.5412844036697249) internal successors, (504), 327 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 504 transitions. [2021-12-17 03:12:27,034 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 504 transitions. Word has length 112 [2021-12-17 03:12:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:27,034 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 504 transitions. [2021-12-17 03:12:27,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 504 transitions. [2021-12-17 03:12:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:12:27,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:27,035 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:27,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:12:27,036 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 898534502, now seen corresponding path program 1 times [2021-12-17 03:12:27,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:27,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444450897] [2021-12-17 03:12:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:27,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:12:27,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:27,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444450897] [2021-12-17 03:12:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444450897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:27,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:27,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:27,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911966382] [2021-12-17 03:12:27,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:27,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:27,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:27,116 INFO L87 Difference]: Start difference. First operand 328 states and 504 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:28,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:29,183 INFO L93 Difference]: Finished difference Result 719 states and 1108 transitions. [2021-12-17 03:12:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-17 03:12:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:29,185 INFO L225 Difference]: With dead ends: 719 [2021-12-17 03:12:29,185 INFO L226 Difference]: Without dead ends: 412 [2021-12-17 03:12:29,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:29,186 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 70 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:29,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 465 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:12:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-17 03:12:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 367. [2021-12-17 03:12:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.546448087431694) internal successors, (566), 366 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 566 transitions. [2021-12-17 03:12:29,193 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 566 transitions. Word has length 117 [2021-12-17 03:12:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:29,193 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 566 transitions. [2021-12-17 03:12:29,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 566 transitions. [2021-12-17 03:12:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:12:29,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:29,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:12:29,195 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1785757348, now seen corresponding path program 1 times [2021-12-17 03:12:29,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:29,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974149096] [2021-12-17 03:12:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:29,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 03:12:29,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974149096] [2021-12-17 03:12:29,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974149096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:29,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:29,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:29,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038255609] [2021-12-17 03:12:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:29,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:29,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:29,285 INFO L87 Difference]: Start difference. First operand 367 states and 566 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) [2021-12-17 03:12:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:29,654 INFO L93 Difference]: Finished difference Result 750 states and 1160 transitions. [2021-12-17 03:12:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:29,654 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 117 [2021-12-17 03:12:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:29,656 INFO L225 Difference]: With dead ends: 750 [2021-12-17 03:12:29,656 INFO L226 Difference]: Without dead ends: 404 [2021-12-17 03:12:29,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:29,657 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 26 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:29,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 561 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:12:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-17 03:12:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 391. [2021-12-17 03:12:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.541025641025641) internal successors, (601), 390 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 601 transitions. [2021-12-17 03:12:29,664 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 601 transitions. Word has length 117 [2021-12-17 03:12:29,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:29,664 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 601 transitions. [2021-12-17 03:12:29,664 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) [2021-12-17 03:12:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 601 transitions. [2021-12-17 03:12:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 03:12:29,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:29,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:29,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:12:29,666 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash 198816901, now seen corresponding path program 1 times [2021-12-17 03:12:29,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:29,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515702510] [2021-12-17 03:12:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:29,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:12:29,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:29,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515702510] [2021-12-17 03:12:29,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515702510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:29,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:29,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384223008] [2021-12-17 03:12:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:29,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:29,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:29,754 INFO L87 Difference]: Start difference. First operand 391 states and 601 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:31,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:31,427 INFO L93 Difference]: Finished difference Result 825 states and 1267 transitions. [2021-12-17 03:12:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-17 03:12:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:31,429 INFO L225 Difference]: With dead ends: 825 [2021-12-17 03:12:31,429 INFO L226 Difference]: Without dead ends: 455 [2021-12-17 03:12:31,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:31,430 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 106 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:31,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 338 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:12:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-17 03:12:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 391. [2021-12-17 03:12:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.535897435897436) internal successors, (599), 390 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 599 transitions. [2021-12-17 03:12:31,437 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 599 transitions. Word has length 118 [2021-12-17 03:12:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:31,437 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 599 transitions. [2021-12-17 03:12:31,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 599 transitions. [2021-12-17 03:12:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 03:12:31,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:31,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:31,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:12:31,439 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2071638908, now seen corresponding path program 1 times [2021-12-17 03:12:31,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:31,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282888371] [2021-12-17 03:12:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:31,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:12:31,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282888371] [2021-12-17 03:12:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282888371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:31,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:31,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:31,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153463584] [2021-12-17 03:12:31,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:31,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:31,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:31,534 INFO L87 Difference]: Start difference. First operand 391 states and 599 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:32,091 INFO L93 Difference]: Finished difference Result 865 states and 1327 transitions. [2021-12-17 03:12:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-17 03:12:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:32,093 INFO L225 Difference]: With dead ends: 865 [2021-12-17 03:12:32,093 INFO L226 Difference]: Without dead ends: 495 [2021-12-17 03:12:32,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:32,094 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 99 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:32,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 359 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:12:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-17 03:12:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 434. [2021-12-17 03:12:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.5427251732101617) internal successors, (668), 433 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 668 transitions. [2021-12-17 03:12:32,101 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 668 transitions. Word has length 126 [2021-12-17 03:12:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:32,101 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 668 transitions. [2021-12-17 03:12:32,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 668 transitions. [2021-12-17 03:12:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 03:12:32,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:32,103 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:32,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:12:32,103 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash -536580530, now seen corresponding path program 1 times [2021-12-17 03:12:32,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:32,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565657138] [2021-12-17 03:12:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:32,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:12:32,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:32,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565657138] [2021-12-17 03:12:32,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565657138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:32,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:32,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:32,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97079264] [2021-12-17 03:12:32,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:32,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:32,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:32,177 INFO L87 Difference]: Start difference. First operand 434 states and 668 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:34,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:34,404 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2021-12-17 03:12:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 126 [2021-12-17 03:12:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:34,406 INFO L225 Difference]: With dead ends: 888 [2021-12-17 03:12:34,406 INFO L226 Difference]: Without dead ends: 475 [2021-12-17 03:12:34,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:34,407 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 86 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:34,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 465 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-17 03:12:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 434. [2021-12-17 03:12:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.5404157043879907) internal successors, (667), 433 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 667 transitions. [2021-12-17 03:12:34,415 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 667 transitions. Word has length 126 [2021-12-17 03:12:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:34,415 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 667 transitions. [2021-12-17 03:12:34,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 667 transitions. [2021-12-17 03:12:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 03:12:34,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:34,416 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:34,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:12:34,417 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 788275664, now seen corresponding path program 1 times [2021-12-17 03:12:34,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281085541] [2021-12-17 03:12:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:34,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:12:34,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:34,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281085541] [2021-12-17 03:12:34,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281085541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:34,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:34,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:34,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829934813] [2021-12-17 03:12:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:34,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:34,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:34,502 INFO L87 Difference]: Start difference. First operand 434 states and 667 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:34,991 INFO L93 Difference]: Finished difference Result 911 states and 1399 transitions. [2021-12-17 03:12:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:34,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 126 [2021-12-17 03:12:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:34,995 INFO L225 Difference]: With dead ends: 911 [2021-12-17 03:12:34,995 INFO L226 Difference]: Without dead ends: 498 [2021-12-17 03:12:34,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:34,996 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 126 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:34,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 342 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:12:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-17 03:12:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 434. [2021-12-17 03:12:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.5265588914549653) internal successors, (661), 433 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 661 transitions. [2021-12-17 03:12:35,005 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 661 transitions. Word has length 126 [2021-12-17 03:12:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:35,006 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 661 transitions. [2021-12-17 03:12:35,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 661 transitions. [2021-12-17 03:12:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 03:12:35,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:35,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:12:35,008 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1967179869, now seen corresponding path program 1 times [2021-12-17 03:12:35,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:35,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099166469] [2021-12-17 03:12:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:35,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:12:35,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099166469] [2021-12-17 03:12:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099166469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:35,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:35,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:35,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701816287] [2021-12-17 03:12:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:35,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:35,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:35,089 INFO L87 Difference]: Start difference. First operand 434 states and 661 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:35,640 INFO L93 Difference]: Finished difference Result 911 states and 1387 transitions. [2021-12-17 03:12:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:35,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 127 [2021-12-17 03:12:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:35,648 INFO L225 Difference]: With dead ends: 911 [2021-12-17 03:12:35,648 INFO L226 Difference]: Without dead ends: 496 [2021-12-17 03:12:35,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:35,649 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 99 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:35,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 342 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:12:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-17 03:12:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 436. [2021-12-17 03:12:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.5264367816091955) internal successors, (664), 435 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 664 transitions. [2021-12-17 03:12:35,673 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 664 transitions. Word has length 127 [2021-12-17 03:12:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:35,673 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 664 transitions. [2021-12-17 03:12:35,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 664 transitions. [2021-12-17 03:12:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 03:12:35,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:35,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:35,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:12:35,675 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1041775288, now seen corresponding path program 1 times [2021-12-17 03:12:35,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:35,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667126439] [2021-12-17 03:12:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:35,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:12:35,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:35,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667126439] [2021-12-17 03:12:35,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667126439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:35,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:35,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:35,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953197639] [2021-12-17 03:12:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:35,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:35,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:35,754 INFO L87 Difference]: Start difference. First operand 436 states and 664 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:37,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:37,476 INFO L93 Difference]: Finished difference Result 886 states and 1350 transitions. [2021-12-17 03:12:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:37,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-17 03:12:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:37,478 INFO L225 Difference]: With dead ends: 886 [2021-12-17 03:12:37,478 INFO L226 Difference]: Without dead ends: 471 [2021-12-17 03:12:37,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:37,479 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 70 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:37,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 483 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:12:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-17 03:12:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 436. [2021-12-17 03:12:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.5241379310344827) internal successors, (663), 435 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 663 transitions. [2021-12-17 03:12:37,485 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 663 transitions. Word has length 139 [2021-12-17 03:12:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:37,486 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 663 transitions. [2021-12-17 03:12:37,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 663 transitions. [2021-12-17 03:12:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 03:12:37,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:37,487 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:37,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:12:37,487 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 923128465, now seen corresponding path program 1 times [2021-12-17 03:12:37,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:37,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898013034] [2021-12-17 03:12:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:37,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:12:37,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:37,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898013034] [2021-12-17 03:12:37,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898013034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:37,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:37,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:37,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951815543] [2021-12-17 03:12:37,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:37,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:37,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:37,568 INFO L87 Difference]: Start difference. First operand 436 states and 663 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:39,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:39,617 INFO L93 Difference]: Finished difference Result 886 states and 1348 transitions. [2021-12-17 03:12:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-17 03:12:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:39,619 INFO L225 Difference]: With dead ends: 886 [2021-12-17 03:12:39,619 INFO L226 Difference]: Without dead ends: 471 [2021-12-17 03:12:39,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:39,620 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 63 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:39,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 483 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 03:12:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-17 03:12:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 436. [2021-12-17 03:12:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.5218390804597701) internal successors, (662), 435 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 662 transitions. [2021-12-17 03:12:39,626 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 662 transitions. Word has length 139 [2021-12-17 03:12:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:39,627 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 662 transitions. [2021-12-17 03:12:39,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 662 transitions. [2021-12-17 03:12:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 03:12:39,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:39,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:39,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:12:39,628 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2098506490, now seen corresponding path program 1 times [2021-12-17 03:12:39,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:39,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475897771] [2021-12-17 03:12:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:39,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:12:39,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475897771] [2021-12-17 03:12:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475897771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:39,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:39,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054431298] [2021-12-17 03:12:39,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:39,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:39,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:39,704 INFO L87 Difference]: Start difference. First operand 436 states and 662 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:41,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:41,967 INFO L93 Difference]: Finished difference Result 951 states and 1446 transitions. [2021-12-17 03:12:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 139 [2021-12-17 03:12:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:41,969 INFO L225 Difference]: With dead ends: 951 [2021-12-17 03:12:41,969 INFO L226 Difference]: Without dead ends: 536 [2021-12-17 03:12:41,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:41,969 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 102 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:41,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 366 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-12-17 03:12:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 466. [2021-12-17 03:12:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.5204301075268818) internal successors, (707), 465 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 707 transitions. [2021-12-17 03:12:41,977 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 707 transitions. Word has length 139 [2021-12-17 03:12:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:41,977 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 707 transitions. [2021-12-17 03:12:41,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 707 transitions. [2021-12-17 03:12:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-17 03:12:41,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:41,979 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:41,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:12:41,979 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1310833163, now seen corresponding path program 1 times [2021-12-17 03:12:41,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:41,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300336810] [2021-12-17 03:12:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:41,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:12:42,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300336810] [2021-12-17 03:12:42,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300336810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:42,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:42,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:42,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098780853] [2021-12-17 03:12:42,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:42,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:42,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:42,089 INFO L87 Difference]: Start difference. First operand 466 states and 707 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:43,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:44,175 INFO L93 Difference]: Finished difference Result 971 states and 1472 transitions. [2021-12-17 03:12:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-17 03:12:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:44,177 INFO L225 Difference]: With dead ends: 971 [2021-12-17 03:12:44,177 INFO L226 Difference]: Without dead ends: 526 [2021-12-17 03:12:44,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:44,178 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 109 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:44,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 364 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:12:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-17 03:12:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 466. [2021-12-17 03:12:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.5075268817204301) internal successors, (701), 465 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 701 transitions. [2021-12-17 03:12:44,186 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 701 transitions. Word has length 140 [2021-12-17 03:12:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:44,186 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 701 transitions. [2021-12-17 03:12:44,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 701 transitions. [2021-12-17 03:12:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:12:44,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:44,187 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:44,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:12:44,188 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2138352260, now seen corresponding path program 1 times [2021-12-17 03:12:44,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:44,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667862387] [2021-12-17 03:12:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:44,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:12:44,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:44,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667862387] [2021-12-17 03:12:44,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667862387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:44,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:44,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:44,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603720141] [2021-12-17 03:12:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:44,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:44,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:44,268 INFO L87 Difference]: Start difference. First operand 466 states and 701 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:46,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:46,555 INFO L93 Difference]: Finished difference Result 1013 states and 1524 transitions. [2021-12-17 03:12:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 03:12:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:46,558 INFO L225 Difference]: With dead ends: 1013 [2021-12-17 03:12:46,558 INFO L226 Difference]: Without dead ends: 568 [2021-12-17 03:12:46,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:46,559 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 111 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:46,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 364 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:12:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-12-17 03:12:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 494. [2021-12-17 03:12:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4949290060851927) internal successors, (737), 493 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 737 transitions. [2021-12-17 03:12:46,566 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 737 transitions. Word has length 142 [2021-12-17 03:12:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:46,566 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 737 transitions. [2021-12-17 03:12:46,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 737 transitions. [2021-12-17 03:12:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 03:12:46,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:46,568 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:46,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:12:46,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1346533418, now seen corresponding path program 1 times [2021-12-17 03:12:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30410276] [2021-12-17 03:12:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:46,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:12:46,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30410276] [2021-12-17 03:12:46,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30410276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:46,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:46,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:46,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322294476] [2021-12-17 03:12:46,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:46,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:46,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:46,669 INFO L87 Difference]: Start difference. First operand 494 states and 737 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:48,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:48,935 INFO L93 Difference]: Finished difference Result 1027 states and 1532 transitions. [2021-12-17 03:12:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:48,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-17 03:12:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:48,937 INFO L225 Difference]: With dead ends: 1027 [2021-12-17 03:12:48,937 INFO L226 Difference]: Without dead ends: 554 [2021-12-17 03:12:48,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:48,938 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 110 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:48,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 344 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-17 03:12:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 494. [2021-12-17 03:12:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4807302231237323) internal successors, (730), 493 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 730 transitions. [2021-12-17 03:12:48,949 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 730 transitions. Word has length 143 [2021-12-17 03:12:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:48,950 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 730 transitions. [2021-12-17 03:12:48,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 730 transitions. [2021-12-17 03:12:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 03:12:48,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:48,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:48,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:12:48,952 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 975125816, now seen corresponding path program 1 times [2021-12-17 03:12:48,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:48,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755577790] [2021-12-17 03:12:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:48,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:12:49,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755577790] [2021-12-17 03:12:49,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755577790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:49,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:49,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:49,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100494610] [2021-12-17 03:12:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:49,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:49,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:49,034 INFO L87 Difference]: Start difference. First operand 494 states and 730 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:51,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:51,269 INFO L93 Difference]: Finished difference Result 999 states and 1478 transitions. [2021-12-17 03:12:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:51,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-17 03:12:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:51,278 INFO L225 Difference]: With dead ends: 999 [2021-12-17 03:12:51,278 INFO L226 Difference]: Without dead ends: 526 [2021-12-17 03:12:51,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:51,279 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 44 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:51,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 503 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-17 03:12:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 499. [2021-12-17 03:12:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.4799196787148594) internal successors, (737), 498 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 737 transitions. [2021-12-17 03:12:51,286 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 737 transitions. Word has length 149 [2021-12-17 03:12:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:51,286 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 737 transitions. [2021-12-17 03:12:51,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 737 transitions. [2021-12-17 03:12:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-17 03:12:51,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:51,288 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:51,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:12:51,288 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1350973257, now seen corresponding path program 1 times [2021-12-17 03:12:51,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500028645] [2021-12-17 03:12:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:51,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:12:51,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500028645] [2021-12-17 03:12:51,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500028645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:51,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:51,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:51,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168740589] [2021-12-17 03:12:51,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:51,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:51,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:51,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:51,360 INFO L87 Difference]: Start difference. First operand 499 states and 737 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:53,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:53,566 INFO L93 Difference]: Finished difference Result 1002 states and 1482 transitions. [2021-12-17 03:12:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-12-17 03:12:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:53,568 INFO L225 Difference]: With dead ends: 1002 [2021-12-17 03:12:53,568 INFO L226 Difference]: Without dead ends: 524 [2021-12-17 03:12:53,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:53,569 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 41 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:53,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 505 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-12-17 03:12:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2021-12-17 03:12:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.4789579158316633) internal successors, (738), 499 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 738 transitions. [2021-12-17 03:12:53,577 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 738 transitions. Word has length 150 [2021-12-17 03:12:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:53,577 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 738 transitions. [2021-12-17 03:12:53,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 738 transitions. [2021-12-17 03:12:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 03:12:53,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:53,579 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:53,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:12:53,579 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -165911759, now seen corresponding path program 1 times [2021-12-17 03:12:53,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957447232] [2021-12-17 03:12:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:53,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 03:12:53,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:53,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957447232] [2021-12-17 03:12:53,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957447232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:53,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:53,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:53,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53688546] [2021-12-17 03:12:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:53,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:53,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:53,683 INFO L87 Difference]: Start difference. First operand 500 states and 738 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:55,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:55,937 INFO L93 Difference]: Finished difference Result 1079 states and 1594 transitions. [2021-12-17 03:12:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-17 03:12:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:55,939 INFO L225 Difference]: With dead ends: 1079 [2021-12-17 03:12:55,939 INFO L226 Difference]: Without dead ends: 600 [2021-12-17 03:12:55,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:55,940 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 107 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:55,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 346 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-12-17 03:12:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 530. [2021-12-17 03:12:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.4688090737240076) internal successors, (777), 529 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 777 transitions. [2021-12-17 03:12:55,948 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 777 transitions. Word has length 161 [2021-12-17 03:12:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 777 transitions. [2021-12-17 03:12:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 777 transitions. [2021-12-17 03:12:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 03:12:55,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:55,950 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:55,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:12:55,950 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 153715343, now seen corresponding path program 1 times [2021-12-17 03:12:55,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35115222] [2021-12-17 03:12:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:55,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:12:56,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35115222] [2021-12-17 03:12:56,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35115222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:56,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:56,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:12:56,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39911900] [2021-12-17 03:12:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:56,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:12:56,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:12:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,070 INFO L87 Difference]: Start difference. First operand 530 states and 777 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:56,101 INFO L93 Difference]: Finished difference Result 1541 states and 2273 transitions. [2021-12-17 03:12:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:12:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-17 03:12:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:56,104 INFO L225 Difference]: With dead ends: 1541 [2021-12-17 03:12:56,104 INFO L226 Difference]: Without dead ends: 1032 [2021-12-17 03:12:56,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,105 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 559 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:12:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-12-17 03:12:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1032. [2021-12-17 03:12:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.4684772065955383) internal successors, (1514), 1031 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1514 transitions. [2021-12-17 03:12:56,121 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1514 transitions. Word has length 167 [2021-12-17 03:12:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:56,121 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1514 transitions. [2021-12-17 03:12:56,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1514 transitions. [2021-12-17 03:12:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:12:56,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:56,123 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:56,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:12:56,123 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 493144206, now seen corresponding path program 1 times [2021-12-17 03:12:56,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875630335] [2021-12-17 03:12:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:56,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:12:56,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875630335] [2021-12-17 03:12:56,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875630335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:56,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:56,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:12:56,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407108985] [2021-12-17 03:12:56,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:56,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:12:56,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:12:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,221 INFO L87 Difference]: Start difference. First operand 1032 states and 1514 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:56,256 INFO L93 Difference]: Finished difference Result 2513 states and 3700 transitions. [2021-12-17 03:12:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:12:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 168 [2021-12-17 03:12:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:56,260 INFO L225 Difference]: With dead ends: 2513 [2021-12-17 03:12:56,260 INFO L226 Difference]: Without dead ends: 1502 [2021-12-17 03:12:56,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,261 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:56,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 560 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:12:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-12-17 03:12:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2021-12-17 03:12:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 1.4683544303797469) internal successors, (2204), 1501 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2204 transitions. [2021-12-17 03:12:56,281 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2204 transitions. Word has length 168 [2021-12-17 03:12:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:56,281 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 2204 transitions. [2021-12-17 03:12:56,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2204 transitions. [2021-12-17 03:12:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-17 03:12:56,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:56,284 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:56,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:12:56,284 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1716174966, now seen corresponding path program 1 times [2021-12-17 03:12:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:56,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248077028] [2021-12-17 03:12:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:56,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 03:12:56,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248077028] [2021-12-17 03:12:56,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248077028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:56,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:56,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:12:56,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581311680] [2021-12-17 03:12:56,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:56,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:12:56,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:12:56,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,380 INFO L87 Difference]: Start difference. First operand 1502 states and 2204 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:56,433 INFO L93 Difference]: Finished difference Result 3444 states and 5067 transitions. [2021-12-17 03:12:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:12:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-17 03:12:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:56,438 INFO L225 Difference]: With dead ends: 3444 [2021-12-17 03:12:56,438 INFO L226 Difference]: Without dead ends: 1963 [2021-12-17 03:12:56,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,439 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 138 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:56,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 440 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:12:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-12-17 03:12:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1963. [2021-12-17 03:12:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 1.4683995922528033) internal successors, (2881), 1962 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2881 transitions. [2021-12-17 03:12:56,462 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2881 transitions. Word has length 169 [2021-12-17 03:12:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:56,463 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 2881 transitions. [2021-12-17 03:12:56,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2881 transitions. [2021-12-17 03:12:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-17 03:12:56,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:56,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:56,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:12:56,466 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1994020680, now seen corresponding path program 1 times [2021-12-17 03:12:56,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:56,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643454815] [2021-12-17 03:12:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:56,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 03:12:56,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643454815] [2021-12-17 03:12:56,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643454815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:56,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:56,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:12:56,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555340302] [2021-12-17 03:12:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:56,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:12:56,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:12:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,565 INFO L87 Difference]: Start difference. First operand 1963 states and 2881 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:56,600 INFO L93 Difference]: Finished difference Result 3932 states and 5774 transitions. [2021-12-17 03:12:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:12:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-17 03:12:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:56,606 INFO L225 Difference]: With dead ends: 3932 [2021-12-17 03:12:56,606 INFO L226 Difference]: Without dead ends: 1990 [2021-12-17 03:12:56,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,608 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:56,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 406 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:12:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-12-17 03:12:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1990. [2021-12-17 03:12:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 1.4660633484162895) internal successors, (2916), 1989 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2916 transitions. [2021-12-17 03:12:56,651 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2916 transitions. Word has length 169 [2021-12-17 03:12:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:56,652 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 2916 transitions. [2021-12-17 03:12:56,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2916 transitions. [2021-12-17 03:12:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-17 03:12:56,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:56,655 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:56,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:12:56,655 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1729373190, now seen corresponding path program 1 times [2021-12-17 03:12:56,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:56,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333129037] [2021-12-17 03:12:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:56,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 03:12:56,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333129037] [2021-12-17 03:12:56,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333129037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:56,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:56,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:12:56,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310727320] [2021-12-17 03:12:56,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:56,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:12:56,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:12:56,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,721 INFO L87 Difference]: Start difference. First operand 1990 states and 2916 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:56,755 INFO L93 Difference]: Finished difference Result 3961 states and 5810 transitions. [2021-12-17 03:12:56,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:12:56,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-17 03:12:56,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:56,761 INFO L225 Difference]: With dead ends: 3961 [2021-12-17 03:12:56,761 INFO L226 Difference]: Without dead ends: 1992 [2021-12-17 03:12:56,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:12:56,763 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:56,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 385 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:12:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-12-17 03:12:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1992. [2021-12-17 03:12:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 1.4655951783023606) internal successors, (2918), 1991 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2918 transitions. [2021-12-17 03:12:56,791 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2918 transitions. Word has length 169 [2021-12-17 03:12:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:56,792 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 2918 transitions. [2021-12-17 03:12:56,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2918 transitions. [2021-12-17 03:12:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-17 03:12:56,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:56,796 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:12:56,796 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1669644410, now seen corresponding path program 1 times [2021-12-17 03:12:56,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:56,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110579421] [2021-12-17 03:12:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:56,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-17 03:12:56,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:56,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110579421] [2021-12-17 03:12:56,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110579421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:56,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:56,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:56,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81609230] [2021-12-17 03:12:56,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:56,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:56,924 INFO L87 Difference]: Start difference. First operand 1992 states and 2918 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:58,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:12:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:12:59,149 INFO L93 Difference]: Finished difference Result 4210 states and 6152 transitions. [2021-12-17 03:12:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:12:59,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 272 [2021-12-17 03:12:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:12:59,169 INFO L225 Difference]: With dead ends: 4210 [2021-12-17 03:12:59,169 INFO L226 Difference]: Without dead ends: 2241 [2021-12-17 03:12:59,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:12:59,172 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 45 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:12:59,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 583 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:12:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-12-17 03:12:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2132. [2021-12-17 03:12:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 1.4650398873768185) internal successors, (3122), 2131 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3122 transitions. [2021-12-17 03:12:59,203 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3122 transitions. Word has length 272 [2021-12-17 03:12:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:12:59,204 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3122 transitions. [2021-12-17 03:12:59,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:12:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3122 transitions. [2021-12-17 03:12:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-17 03:12:59,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:12:59,207 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:12:59,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:12:59,208 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:12:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:12:59,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1295733323, now seen corresponding path program 1 times [2021-12-17 03:12:59,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:12:59,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925348065] [2021-12-17 03:12:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:12:59,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:12:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:12:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-17 03:12:59,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:12:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925348065] [2021-12-17 03:12:59,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925348065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:12:59,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:12:59,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:12:59,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193125826] [2021-12-17 03:12:59,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:12:59,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:12:59,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:12:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:12:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:12:59,336 INFO L87 Difference]: Start difference. First operand 2132 states and 3122 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:01,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:01,561 INFO L93 Difference]: Finished difference Result 4342 states and 6344 transitions. [2021-12-17 03:13:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:01,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 273 [2021-12-17 03:13:01,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:01,580 INFO L225 Difference]: With dead ends: 4342 [2021-12-17 03:13:01,580 INFO L226 Difference]: Without dead ends: 2233 [2021-12-17 03:13:01,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:01,583 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 42 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:01,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 579 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-12-17 03:13:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2088. [2021-12-17 03:13:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 1.4652611403929086) internal successors, (3058), 2087 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3058 transitions. [2021-12-17 03:13:01,640 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3058 transitions. Word has length 273 [2021-12-17 03:13:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:01,641 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3058 transitions. [2021-12-17 03:13:01,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3058 transitions. [2021-12-17 03:13:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-17 03:13:01,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:01,645 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:01,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:13:01,645 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1549103668, now seen corresponding path program 1 times [2021-12-17 03:13:01,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037875372] [2021-12-17 03:13:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:01,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-17 03:13:01,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037875372] [2021-12-17 03:13:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037875372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:01,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:01,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473380429] [2021-12-17 03:13:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:01,765 INFO L87 Difference]: Start difference. First operand 2088 states and 3058 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:03,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:04,046 INFO L93 Difference]: Finished difference Result 4298 states and 6276 transitions. [2021-12-17 03:13:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:04,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 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 292 [2021-12-17 03:13:04,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:04,074 INFO L225 Difference]: With dead ends: 4298 [2021-12-17 03:13:04,074 INFO L226 Difference]: Without dead ends: 2233 [2021-12-17 03:13:04,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:04,076 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 36 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:04,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 577 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-12-17 03:13:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2156. [2021-12-17 03:13:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 1.459860788863109) internal successors, (3146), 2155 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3146 transitions. [2021-12-17 03:13:04,112 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3146 transitions. Word has length 292 [2021-12-17 03:13:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:04,113 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3146 transitions. [2021-12-17 03:13:04,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:04,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3146 transitions. [2021-12-17 03:13:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-17 03:13:04,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:04,117 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:04,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:13:04,117 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1978761974, now seen corresponding path program 1 times [2021-12-17 03:13:04,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:04,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435053245] [2021-12-17 03:13:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:04,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-17 03:13:04,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:04,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435053245] [2021-12-17 03:13:04,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435053245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:04,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:04,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:13:04,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932459098] [2021-12-17 03:13:04,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:04,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:13:04,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:04,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:13:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:13:04,429 INFO L87 Difference]: Start difference. First operand 2156 states and 3146 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:06,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:07,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:09,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:10,786 INFO L93 Difference]: Finished difference Result 6282 states and 9176 transitions. [2021-12-17 03:13:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:13:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-12-17 03:13:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:10,792 INFO L225 Difference]: With dead ends: 6282 [2021-12-17 03:13:10,792 INFO L226 Difference]: Without dead ends: 4149 [2021-12-17 03:13:10,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:13:10,795 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 395 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 100 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:10,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1082 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 758 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-12-17 03:13:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-12-17 03:13:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3974. [2021-12-17 03:13:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 1.4714321671281148) internal successors, (5846), 3973 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 5846 transitions. [2021-12-17 03:13:10,848 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 5846 transitions. Word has length 292 [2021-12-17 03:13:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:10,849 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 5846 transitions. [2021-12-17 03:13:10,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 5846 transitions. [2021-12-17 03:13:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-17 03:13:10,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:10,855 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:10,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:13:10,856 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -789789195, now seen corresponding path program 1 times [2021-12-17 03:13:10,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:10,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604471292] [2021-12-17 03:13:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:10,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 03:13:11,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:11,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604471292] [2021-12-17 03:13:11,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604471292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:11,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:11,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:11,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357783585] [2021-12-17 03:13:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:11,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:11,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:11,004 INFO L87 Difference]: Start difference. First operand 3974 states and 5846 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:11,654 INFO L93 Difference]: Finished difference Result 8071 states and 11847 transitions. [2021-12-17 03:13:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-12-17 03:13:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:11,659 INFO L225 Difference]: With dead ends: 8071 [2021-12-17 03:13:11,659 INFO L226 Difference]: Without dead ends: 4120 [2021-12-17 03:13:11,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:11,664 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 50 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:11,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 575 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:13:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-12-17 03:13:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3974. [2021-12-17 03:13:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 1.469418575383841) internal successors, (5838), 3973 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 5838 transitions. [2021-12-17 03:13:11,719 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 5838 transitions. Word has length 293 [2021-12-17 03:13:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:11,720 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 5838 transitions. [2021-12-17 03:13:11,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 5838 transitions. [2021-12-17 03:13:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-17 03:13:11,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:11,725 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:11,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:13:11,725 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1786575207, now seen corresponding path program 1 times [2021-12-17 03:13:11,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:11,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114356492] [2021-12-17 03:13:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:11,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-17 03:13:11,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114356492] [2021-12-17 03:13:11,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114356492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:11,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:11,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:11,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069473065] [2021-12-17 03:13:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:11,865 INFO L87 Difference]: Start difference. First operand 3974 states and 5838 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:13,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:14,119 INFO L93 Difference]: Finished difference Result 8067 states and 11827 transitions. [2021-12-17 03:13:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 293 [2021-12-17 03:13:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:14,155 INFO L225 Difference]: With dead ends: 8067 [2021-12-17 03:13:14,155 INFO L226 Difference]: Without dead ends: 4084 [2021-12-17 03:13:14,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:14,161 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 34 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:14,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 573 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2021-12-17 03:13:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 3946. [2021-12-17 03:13:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 1.4707224334600761) internal successors, (5802), 3945 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 5802 transitions. [2021-12-17 03:13:14,250 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 5802 transitions. Word has length 293 [2021-12-17 03:13:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:14,251 INFO L470 AbstractCegarLoop]: Abstraction has 3946 states and 5802 transitions. [2021-12-17 03:13:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 5802 transitions. [2021-12-17 03:13:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-17 03:13:14,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:14,256 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:14,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:13:14,256 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash -840485924, now seen corresponding path program 1 times [2021-12-17 03:13:14,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:14,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596380796] [2021-12-17 03:13:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:14,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-17 03:13:14,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:14,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596380796] [2021-12-17 03:13:14,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596380796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:14,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:14,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:14,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207086223] [2021-12-17 03:13:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:14,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:14,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:14,417 INFO L87 Difference]: Start difference. First operand 3946 states and 5802 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:16,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:16,635 INFO L93 Difference]: Finished difference Result 8183 states and 12023 transitions. [2021-12-17 03:13:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-12-17 03:13:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:16,642 INFO L225 Difference]: With dead ends: 8183 [2021-12-17 03:13:16,643 INFO L226 Difference]: Without dead ends: 4260 [2021-12-17 03:13:16,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:16,646 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 28 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:16,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 563 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2021-12-17 03:13:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 4154. [2021-12-17 03:13:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4153 states have (on average 1.470262460871659) internal successors, (6106), 4153 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 6106 transitions. [2021-12-17 03:13:16,748 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 6106 transitions. Word has length 294 [2021-12-17 03:13:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:16,751 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 6106 transitions. [2021-12-17 03:13:16,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 6106 transitions. [2021-12-17 03:13:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-17 03:13:16,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:16,758 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:16,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:13:16,759 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1831076287, now seen corresponding path program 1 times [2021-12-17 03:13:16,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:16,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784418521] [2021-12-17 03:13:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:16,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 03:13:16,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784418521] [2021-12-17 03:13:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784418521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:16,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:16,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:16,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303770962] [2021-12-17 03:13:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:16,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:16,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:16,922 INFO L87 Difference]: Start difference. First operand 4154 states and 6106 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:18,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:19,159 INFO L93 Difference]: Finished difference Result 8407 states and 12335 transitions. [2021-12-17 03:13:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-12-17 03:13:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:19,167 INFO L225 Difference]: With dead ends: 8407 [2021-12-17 03:13:19,167 INFO L226 Difference]: Without dead ends: 4276 [2021-12-17 03:13:19,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:19,172 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 38 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:19,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 571 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-12-17 03:13:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4154. [2021-12-17 03:13:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4153 states have (on average 1.468336142547556) internal successors, (6098), 4153 states have internal predecessors, (6098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 6098 transitions. [2021-12-17 03:13:19,257 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 6098 transitions. Word has length 294 [2021-12-17 03:13:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:19,258 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 6098 transitions. [2021-12-17 03:13:19,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 6098 transitions. [2021-12-17 03:13:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-17 03:13:19,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:19,264 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:19,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:13:19,265 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -469493383, now seen corresponding path program 1 times [2021-12-17 03:13:19,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:19,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708227959] [2021-12-17 03:13:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:19,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-12-17 03:13:19,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:19,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708227959] [2021-12-17 03:13:19,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708227959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:19,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:19,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:19,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785252897] [2021-12-17 03:13:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:19,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:19,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:19,410 INFO L87 Difference]: Start difference. First operand 4154 states and 6098 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:20,147 INFO L93 Difference]: Finished difference Result 8479 states and 12429 transitions. [2021-12-17 03:13:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 303 [2021-12-17 03:13:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:20,153 INFO L225 Difference]: With dead ends: 8479 [2021-12-17 03:13:20,154 INFO L226 Difference]: Without dead ends: 4348 [2021-12-17 03:13:20,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:20,158 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 14 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:20,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 541 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:13:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4348 states. [2021-12-17 03:13:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4348 to 4322. [2021-12-17 03:13:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 1.4630872483221478) internal successors, (6322), 4321 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 6322 transitions. [2021-12-17 03:13:20,239 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 6322 transitions. Word has length 303 [2021-12-17 03:13:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:20,239 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 6322 transitions. [2021-12-17 03:13:20,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 6322 transitions. [2021-12-17 03:13:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-17 03:13:20,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:20,245 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:20,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:13:20,246 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1154460820, now seen corresponding path program 1 times [2021-12-17 03:13:20,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:20,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375008578] [2021-12-17 03:13:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:20,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-17 03:13:20,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375008578] [2021-12-17 03:13:20,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375008578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:20,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:20,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:20,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037388627] [2021-12-17 03:13:20,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:20,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:20,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:20,388 INFO L87 Difference]: Start difference. First operand 4322 states and 6322 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:22,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:22,604 INFO L93 Difference]: Finished difference Result 8743 states and 12767 transitions. [2021-12-17 03:13:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 304 [2021-12-17 03:13:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:22,610 INFO L225 Difference]: With dead ends: 8743 [2021-12-17 03:13:22,610 INFO L226 Difference]: Without dead ends: 4444 [2021-12-17 03:13:22,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:22,614 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 31 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:22,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 569 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-12-17 03:13:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 4322. [2021-12-17 03:13:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 1.4612358250405) internal successors, (6314), 4321 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 6314 transitions. [2021-12-17 03:13:22,687 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 6314 transitions. Word has length 304 [2021-12-17 03:13:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:22,688 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 6314 transitions. [2021-12-17 03:13:22,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 6314 transitions. [2021-12-17 03:13:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-17 03:13:22,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:22,693 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:22,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:13:22,694 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash -312189945, now seen corresponding path program 1 times [2021-12-17 03:13:22,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:22,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546806404] [2021-12-17 03:13:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:22,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 576 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-17 03:13:22,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:22,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546806404] [2021-12-17 03:13:22,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546806404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:22,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:22,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:22,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436118333] [2021-12-17 03:13:22,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:22,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:22,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:22,870 INFO L87 Difference]: Start difference. First operand 4322 states and 6314 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:24,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:25,106 INFO L93 Difference]: Finished difference Result 8711 states and 12711 transitions. [2021-12-17 03:13:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-12-17 03:13:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:25,111 INFO L225 Difference]: With dead ends: 8711 [2021-12-17 03:13:25,111 INFO L226 Difference]: Without dead ends: 4340 [2021-12-17 03:13:25,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:25,116 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:25,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 561 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2021-12-17 03:13:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 4250. [2021-12-17 03:13:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 1.467168745587197) internal successors, (6234), 4249 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 6234 transitions. [2021-12-17 03:13:25,236 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 6234 transitions. Word has length 305 [2021-12-17 03:13:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:25,236 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 6234 transitions. [2021-12-17 03:13:25,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 6234 transitions. [2021-12-17 03:13:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-17 03:13:25,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:25,261 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:13:25,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 03:13:25,261 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 765728480, now seen corresponding path program 1 times [2021-12-17 03:13:25,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618902630] [2021-12-17 03:13:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:25,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 541 proven. 68 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-12-17 03:13:25,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618902630] [2021-12-17 03:13:25,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618902630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:13:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784459420] [2021-12-17 03:13:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:25,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:13:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:13:25,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:13:25,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:13:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 03:13:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:13:26,533 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:13:26,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:13:26,576 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:13:26,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:13:26,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:13:26,732 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:13:26,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-17 03:13:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:13:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 542 proven. 64 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-17 03:13:26,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:13:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 547 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-17 03:13:27,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784459420] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:13:27,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:13:27,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2021-12-17 03:13:27,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035702044] [2021-12-17 03:13:27,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:27,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:27,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:27,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:13:27,372 INFO L87 Difference]: Start difference. First operand 4250 states and 6234 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:29,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:29,670 INFO L93 Difference]: Finished difference Result 8897 states and 13009 transitions. [2021-12-17 03:13:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 314 [2021-12-17 03:13:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:29,675 INFO L225 Difference]: With dead ends: 8897 [2021-12-17 03:13:29,675 INFO L226 Difference]: Without dead ends: 4670 [2021-12-17 03:13:29,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 625 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:13:29,679 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 116 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:29,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 401 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2021-12-17 03:13:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 4250. [2021-12-17 03:13:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 1.4462226406213228) internal successors, (6145), 4249 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 6145 transitions. [2021-12-17 03:13:29,737 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 6145 transitions. Word has length 314 [2021-12-17 03:13:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:29,737 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 6145 transitions. [2021-12-17 03:13:29,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 6145 transitions. [2021-12-17 03:13:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-17 03:13:29,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:29,742 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:29,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:13:29,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-17 03:13:29,964 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash 109235862, now seen corresponding path program 1 times [2021-12-17 03:13:29,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:29,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132875946] [2021-12-17 03:13:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:29,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-17 03:13:30,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:30,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132875946] [2021-12-17 03:13:30,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132875946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:30,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:30,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:30,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060424164] [2021-12-17 03:13:30,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:30,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:30,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:30,117 INFO L87 Difference]: Start difference. First operand 4250 states and 6145 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:31,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:31,398 INFO L93 Difference]: Finished difference Result 8535 states and 12331 transitions. [2021-12-17 03:13:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2021-12-17 03:13:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:31,403 INFO L225 Difference]: With dead ends: 8535 [2021-12-17 03:13:31,404 INFO L226 Difference]: Without dead ends: 4308 [2021-12-17 03:13:31,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:31,409 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 22 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:31,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 551 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:13:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-12-17 03:13:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4250. [2021-12-17 03:13:31,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 1.4443398446693338) internal successors, (6137), 4249 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 6137 transitions. [2021-12-17 03:13:31,519 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 6137 transitions. Word has length 315 [2021-12-17 03:13:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:31,519 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 6137 transitions. [2021-12-17 03:13:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 6137 transitions. [2021-12-17 03:13:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-17 03:13:31,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:31,528 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:31,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:13:31,528 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1445878829, now seen corresponding path program 1 times [2021-12-17 03:13:31,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144626940] [2021-12-17 03:13:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:31,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-12-17 03:13:31,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:31,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144626940] [2021-12-17 03:13:31,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144626940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:31,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:31,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:31,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745702725] [2021-12-17 03:13:31,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:31,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:31,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:31,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:31,663 INFO L87 Difference]: Start difference. First operand 4250 states and 6137 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:33,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:33,893 INFO L93 Difference]: Finished difference Result 8535 states and 12315 transitions. [2021-12-17 03:13:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2021-12-17 03:13:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:33,897 INFO L225 Difference]: With dead ends: 8535 [2021-12-17 03:13:33,897 INFO L226 Difference]: Without dead ends: 4308 [2021-12-17 03:13:33,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:33,900 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 20 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:33,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 549 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-12-17 03:13:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4250. [2021-12-17 03:13:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 1.4424570487173451) internal successors, (6129), 4249 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 6129 transitions. [2021-12-17 03:13:33,951 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 6129 transitions. Word has length 315 [2021-12-17 03:13:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:33,951 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 6129 transitions. [2021-12-17 03:13:33,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 6129 transitions. [2021-12-17 03:13:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-17 03:13:33,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:33,956 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:33,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 03:13:33,956 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1142940541, now seen corresponding path program 1 times [2021-12-17 03:13:33,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:33,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362975155] [2021-12-17 03:13:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:33,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 597 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-12-17 03:13:34,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362975155] [2021-12-17 03:13:34,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362975155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:34,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:34,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:34,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615465792] [2021-12-17 03:13:34,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:34,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:34,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:34,082 INFO L87 Difference]: Start difference. First operand 4250 states and 6129 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:34,813 INFO L93 Difference]: Finished difference Result 8503 states and 12259 transitions. [2021-12-17 03:13:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 316 [2021-12-17 03:13:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:34,819 INFO L225 Difference]: With dead ends: 8503 [2021-12-17 03:13:34,819 INFO L226 Difference]: Without dead ends: 4244 [2021-12-17 03:13:34,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:34,822 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 15 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:34,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 541 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:13:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2021-12-17 03:13:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 4050. [2021-12-17 03:13:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4050 states, 4049 states have (on average 1.448505803902198) internal successors, (5865), 4049 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4050 states to 4050 states and 5865 transitions. [2021-12-17 03:13:34,871 INFO L78 Accepts]: Start accepts. Automaton has 4050 states and 5865 transitions. Word has length 316 [2021-12-17 03:13:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:34,871 INFO L470 AbstractCegarLoop]: Abstraction has 4050 states and 5865 transitions. [2021-12-17 03:13:34,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4050 states and 5865 transitions. [2021-12-17 03:13:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-17 03:13:34,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:34,875 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:34,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 03:13:34,876 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash -774595194, now seen corresponding path program 1 times [2021-12-17 03:13:34,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587491416] [2021-12-17 03:13:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:34,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 671 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-17 03:13:35,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587491416] [2021-12-17 03:13:35,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587491416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:35,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:35,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:13:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438945033] [2021-12-17 03:13:35,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:35,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:13:35,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:35,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:13:35,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:35,125 INFO L87 Difference]: Start difference. First operand 4050 states and 5865 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:37,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:39,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:40,059 INFO L93 Difference]: Finished difference Result 13105 states and 18997 transitions. [2021-12-17 03:13:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 03:13:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 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 321 [2021-12-17 03:13:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:40,070 INFO L225 Difference]: With dead ends: 13105 [2021-12-17 03:13:40,071 INFO L226 Difference]: Without dead ends: 9078 [2021-12-17 03:13:40,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:13:40,090 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 233 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:40,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1032 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 659 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 03:13:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9078 states. [2021-12-17 03:13:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9078 to 3951. [2021-12-17 03:13:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 1.449113924050633) internal successors, (5724), 3950 states have internal predecessors, (5724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 5724 transitions. [2021-12-17 03:13:40,165 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 5724 transitions. Word has length 321 [2021-12-17 03:13:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:40,165 INFO L470 AbstractCegarLoop]: Abstraction has 3951 states and 5724 transitions. [2021-12-17 03:13:40,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 5724 transitions. [2021-12-17 03:13:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-17 03:13:40,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:40,170 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:40,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 03:13:40,170 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -848179772, now seen corresponding path program 1 times [2021-12-17 03:13:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:40,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604457892] [2021-12-17 03:13:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:40,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 905 trivial. 0 not checked. [2021-12-17 03:13:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604457892] [2021-12-17 03:13:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604457892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:40,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:40,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:13:40,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662644099] [2021-12-17 03:13:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:40,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:13:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:13:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:13:40,489 INFO L87 Difference]: Start difference. First operand 3951 states and 5724 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:41,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:43,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:44,077 INFO L93 Difference]: Finished difference Result 7899 states and 11444 transitions. [2021-12-17 03:13:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:13:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-17 03:13:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:44,081 INFO L225 Difference]: With dead ends: 7899 [2021-12-17 03:13:44,081 INFO L226 Difference]: Without dead ends: 3951 [2021-12-17 03:13:44,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:13:44,083 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:44,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 655 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 03:13:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-12-17 03:13:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3951. [2021-12-17 03:13:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 1.4488607594936709) internal successors, (5723), 3950 states have internal predecessors, (5723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 5723 transitions. [2021-12-17 03:13:44,130 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 5723 transitions. Word has length 321 [2021-12-17 03:13:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:44,130 INFO L470 AbstractCegarLoop]: Abstraction has 3951 states and 5723 transitions. [2021-12-17 03:13:44,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 5723 transitions. [2021-12-17 03:13:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-17 03:13:44,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:44,134 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:44,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 03:13:44,134 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash -746809786, now seen corresponding path program 1 times [2021-12-17 03:13:44,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:44,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126210276] [2021-12-17 03:13:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:44,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 514 proven. 208 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-17 03:13:45,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126210276] [2021-12-17 03:13:45,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126210276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:13:45,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477059032] [2021-12-17 03:13:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:13:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:13:45,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:13:45,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:13:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-17 03:13:46,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:13:46,188 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:13:46,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:13:46,307 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-17 03:13:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-17 03:13:46,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:13:46,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:13:46,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 03:13:46,504 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 03:13:46,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 76 [2021-12-17 03:13:46,537 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-12-17 03:13:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 61 [2021-12-17 03:13:46,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,577 INFO L354 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2021-12-17 03:13:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 66 [2021-12-17 03:13:46,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 102 [2021-12-17 03:13:46,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 140 [2021-12-17 03:13:46,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,872 INFO L354 Elim1Store]: treesize reduction 230, result has 24.1 percent of original size [2021-12-17 03:13:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 141 treesize of output 164 [2021-12-17 03:13:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 144 [2021-12-17 03:13:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 138 [2021-12-17 03:13:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,576 INFO L354 Elim1Store]: treesize reduction 270, result has 22.6 percent of original size [2021-12-17 03:13:48,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 150 treesize of output 167 [2021-12-17 03:13:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:48,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 129 [2021-12-17 03:13:50,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:50,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 104 [2021-12-17 03:13:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:51,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 92 [2021-12-17 03:13:51,069 INFO L354 Elim1Store]: treesize reduction 434, result has 17.5 percent of original size [2021-12-17 03:13:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 138 treesize of output 159 [2021-12-17 03:13:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:51,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 98 [2021-12-17 03:13:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 86 [2021-12-17 03:13:51,235 INFO L354 Elim1Store]: treesize reduction 312, result has 23.7 percent of original size [2021-12-17 03:13:51,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 123 treesize of output 161 [2021-12-17 03:13:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:52,439 INFO L354 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2021-12-17 03:13:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 210 treesize of output 205 [2021-12-17 03:13:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:52,480 INFO L354 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2021-12-17 03:13:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 187 treesize of output 170 [2021-12-17 03:13:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:13:52,574 INFO L354 Elim1Store]: treesize reduction 116, result has 47.5 percent of original size [2021-12-17 03:13:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 89 treesize of output 159 [2021-12-17 03:14:25,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,289 INFO L354 Elim1Store]: treesize reduction 384, result has 25.3 percent of original size [2021-12-17 03:14:25,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 420 treesize of output 495 [2021-12-17 03:14:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:25,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 513 treesize of output 453 [2021-12-17 03:14:25,329 INFO L354 Elim1Store]: treesize reduction 154, result has 15.4 percent of original size [2021-12-17 03:14:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 471 treesize of output 405 [2021-12-17 03:15:26,019 WARN L227 SmtUtils]: Spent 44.40s on a formula simplification. DAG size of input: 152 DAG size of output: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:17:29,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 872 treesize of output 718 [2021-12-17 03:17:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 595 [2021-12-17 03:17:29,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:29,652 INFO L354 Elim1Store]: treesize reduction 742, result has 20.9 percent of original size [2021-12-17 03:17:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 6 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 61 case distinctions, treesize of input 608 treesize of output 673 Killed by 15